diff --git a/client/components/app/Appbar.vue b/client/components/app/Appbar.vue
index 9a51288a..879d50a3 100644
--- a/client/components/app/Appbar.vue
+++ b/client/components/app/Appbar.vue
@@ -303,13 +303,13 @@ export default {
       this.$axios
         .patch(`/api/me/progress/batch/update`, updateProgressPayloads)
         .then(() => {
-          this.$toast.success('Batch update success!')
+          this.$toast.success(this.$strings.ToastBatchUpdateSuccess)
           this.$store.commit('setProcessingBatch', false)
           this.$store.commit('globals/resetSelectedMediaItems', [])
           this.$eventBus.$emit('bookshelf_clear_selection')
         })
         .catch((error) => {
-          this.$toast.error('Batch update failed')
+          this.$toast.error(this.$strings.ToastBatchUpdateFailed)
           console.error('Failed to batch update read/not read', error)
           this.$store.commit('setProcessingBatch', false)
         })
diff --git a/client/components/cards/LazyBookCard.vue b/client/components/cards/LazyBookCard.vue
index d5109513..b323c820 100644
--- a/client/components/cards/LazyBookCard.vue
+++ b/client/components/cards/LazyBookCard.vue
@@ -680,7 +680,6 @@ export default {
         .$patch(apiEndpoint, updatePayload)
         .then(() => {
           this.processing = false
-          toast.success(updatePayload.isFinished ? this.$strings.ToastItemMarkedAsFinishedSuccess : this.$strings.ToastItemMarkedAsNotFinishedSuccess)
         })
         .catch((error) => {
           console.error('Failed', error)
diff --git a/client/components/modals/podcast/EpisodeFeed.vue b/client/components/modals/podcast/EpisodeFeed.vue
index b6c135b9..0f75644b 100644
--- a/client/components/modals/podcast/EpisodeFeed.vue
+++ b/client/components/modals/podcast/EpisodeFeed.vue
@@ -110,7 +110,10 @@ export default {
     itemEpisodeMap() {
       const map = {}
       this.itemEpisodes.forEach((item) => {
-        if (item.enclosure) map[item.enclosure.url.split('?')[0]] = true
+        if (item.enclosure) {
+          const cleanUrl = this.getCleanEpisodeUrl(item.enclosure.url)
+          map[cleanUrl] = true
+        }
       })
       return map
     },
@@ -129,6 +132,29 @@ export default {
     }
   },
   methods: {
+    /**
+     * RSS feed episode url is used for matching with existing downloaded episodes.
+     * Some RSS feeds include timestamps in the episode url (e.g. patreon) that can change on requests.
+     * These need to be removed in order to detect the same episode each time the feed is pulled.
+     *
+     * An RSS feed may include an `id` in the query string. In these cases we want to leave the `id`.
+     * @see https://github.com/advplyr/audiobookshelf/issues/1896
+     *
+     * @param {string} url - rss feed episode url
+     * @returns {string} rss feed episode url without dynamic query strings
+     */
+    getCleanEpisodeUrl(url) {
+      let queryString = url.split('?')[1]
+      if (!queryString) return url
+
+      const searchParams = new URLSearchParams(queryString)
+      for (const p of Array.from(searchParams.keys())) {
+        if (p !== 'id') searchParams.delete(p)
+      }
+
+      if (!searchParams.toString()) return url
+      return `${url}?${searchParams.toString()}`
+    },
     inputUpdate() {
       clearTimeout(this.searchTimeout)
       this.searchTimeout = setTimeout(() => {
@@ -198,7 +224,7 @@ export default {
         .map((_ep) => {
           return {
             ..._ep,
-            cleanUrl: _ep.enclosure.url.split('?')[0]
+            cleanUrl: this.getCleanEpisodeUrl(_ep.enclosure.url)
           }
         })
       this.episodesCleaned.sort((a, b) => (a.publishedAt < b.publishedAt ? 1 : -1))
diff --git a/client/components/tables/collection/BookTableRow.vue b/client/components/tables/collection/BookTableRow.vue
index f8cce0b4..834088d9 100644
--- a/client/components/tables/collection/BookTableRow.vue
+++ b/client/components/tables/collection/BookTableRow.vue
@@ -188,7 +188,6 @@ export default {
         .$patch(`/api/me/progress/${this.book.id}`, updatePayload)
         .then(() => {
           this.isProcessingReadUpdate = false
-          this.$toast.success(updatePayload.isFinished ? this.$strings.ToastItemMarkedAsFinishedSuccess : this.$strings.ToastItemMarkedAsNotFinishedSuccess)
         })
         .catch((error) => {
           console.error('Failed', error)
diff --git a/client/components/tables/playlist/ItemTableRow.vue b/client/components/tables/playlist/ItemTableRow.vue
index bfb43825..ff986a33 100644
--- a/client/components/tables/playlist/ItemTableRow.vue
+++ b/client/components/tables/playlist/ItemTableRow.vue
@@ -198,7 +198,6 @@ export default {
         .$patch(routepath, updatePayload)
         .then(() => {
           this.isProcessingReadUpdate = false
-          this.$toast.success(updatePayload.isFinished ? this.$strings.ToastItemMarkedAsFinishedSuccess : this.$strings.ToastItemMarkedAsNotFinishedSuccess)
         })
         .catch((error) => {
           console.error('Failed', error)
diff --git a/client/components/tables/podcast/EpisodeTableRow.vue b/client/components/tables/podcast/EpisodeTableRow.vue
index b05d1c86..4300b8e1 100644
--- a/client/components/tables/podcast/EpisodeTableRow.vue
+++ b/client/components/tables/podcast/EpisodeTableRow.vue
@@ -183,7 +183,6 @@ export default {
         .$patch(`/api/me/progress/${this.libraryItemId}/${this.episode.id}`, updatePayload)
         .then(() => {
           this.isProcessingReadUpdate = false
-          this.$toast.success(updatePayload.isFinished ? this.$strings.ToastItemMarkedAsFinishedSuccess : this.$strings.ToastItemMarkedAsNotFinishedSuccess)
         })
         .catch((error) => {
           console.error('Failed', error)
diff --git a/client/pages/item/_id/index.vue b/client/pages/item/_id/index.vue
index d2160194..ac4e3d8a 100644
--- a/client/pages/item/_id/index.vue
+++ b/client/pages/item/_id/index.vue
@@ -533,7 +533,6 @@ export default {
         .$patch(`/api/me/progress/${this.libraryItemId}`, updatePayload)
         .then(() => {
           this.isProcessingReadUpdate = false
-          this.$toast.success(updatePayload.isFinished ? this.$strings.ToastItemMarkedAsFinishedSuccess : this.$strings.ToastItemMarkedAsNotFinishedSuccess)
         })
         .catch((error) => {
           console.error('Failed', error)
diff --git a/client/pages/library/_library/series/_id.vue b/client/pages/library/_library/series/_id.vue
index c6ad6ad2..865648f8 100644
--- a/client/pages/library/_library/series/_id.vue
+++ b/client/pages/library/_library/series/_id.vue
@@ -19,7 +19,7 @@ export default {
       return redirect(`/library/${libraryId}`)
     }
 
-    const series = await app.$axios.$get(`/api/series/${params.id}?include=progress,rssfeed`).catch((error) => {
+    const series = await app.$axios.$get(`/api/libraries/${library.id}/series/${params.id}?include=progress,rssfeed`).catch((error) => {
       console.error('Failed', error)
       return false
     })
diff --git a/client/players/PlayerHandler.js b/client/players/PlayerHandler.js
index 23bdc9d7..660ca2c1 100644
--- a/client/players/PlayerHandler.js
+++ b/client/players/PlayerHandler.js
@@ -320,7 +320,7 @@ export default class PlayerHandler {
     }
     this.listeningTimeSinceSync = 0
     this.lastSyncTime = 0
-    return this.ctx.$axios.$post(`/api/session/${this.currentSessionId}/close`, syncData, { timeout: 4000 }).catch((error) => {
+    return this.ctx.$axios.$post(`/api/session/${this.currentSessionId}/close`, syncData, { timeout: 6000 }).catch((error) => {
       console.error('Failed to close session', error)
     })
   }
@@ -340,12 +340,13 @@ export default class PlayerHandler {
     }
 
     this.listeningTimeSinceSync = 0
-    this.ctx.$axios.$post(`/api/session/${this.currentSessionId}/sync`, syncData, { timeout: 6000 }).then(() => {
+    this.ctx.$axios.$post(`/api/session/${this.currentSessionId}/sync`, syncData, { timeout: 9000 }).then(() => {
       this.failedProgressSyncs = 0
     }).catch((error) => {
       console.error('Failed to update session progress', error)
+      // After 4 failed sync attempts show an alert toast
       this.failedProgressSyncs++
-      if (this.failedProgressSyncs >= 2) {
+      if (this.failedProgressSyncs >= 4) {
         this.ctx.showFailedProgressSyncs()
         this.failedProgressSyncs = 0
       }
diff --git a/server/controllers/LibraryController.js b/server/controllers/LibraryController.js
index cff0182c..8bc38db7 100644
--- a/server/controllers/LibraryController.js
+++ b/server/controllers/LibraryController.js
@@ -391,7 +391,13 @@ class LibraryController {
     res.sendStatus(200)
   }
 
-  // api/libraries/:id/series
+  /**
+   * api/libraries/:id/series
+   * Optional query string: `?include=rssfeed` that adds `rssFeed` to series if a feed is open
+   * 
+   * @param {*} req 
+   * @param {*} res 
+   */
   async getAllSeriesForLibrary(req, res) {
     const libraryItems = req.libraryItems
 
@@ -452,6 +458,42 @@ class LibraryController {
     res.json(payload)
   }
 
+  /**
+   * api/libraries/:id/series/:seriesId
+   *
+   * Optional includes (e.g. `?include=rssfeed,progress`)
+   * rssfeed: adds `rssFeed` to series object if a feed is open
+   * progress: adds `progress` to series object with { libraryItemIds:Array<llid>, libraryItemIdsFinished:Array<llid>, isFinished:boolean }
+   * 
+   * @param {*} req 
+   * @param {*} res - Series
+   */
+  async getSeriesForLibrary(req, res) {
+    const include = (req.query.include || '').split(',').map(v => v.trim().toLowerCase()).filter(v => !!v)
+
+    const series = Database.series.find(se => se.id === req.params.seriesId)
+    if (!series) return res.sendStatus(404)
+
+    const libraryItemsInSeries = req.libraryItems.filter(li => li.media.metadata.hasSeries?.(series.id))
+
+    const seriesJson = series.toJSON()
+    if (include.includes('progress')) {
+      const libraryItemsFinished = libraryItemsInSeries.filter(li => !!req.user.getMediaProgress(li.id)?.isFinished)
+      seriesJson.progress = {
+        libraryItemIds: libraryItemsInSeries.map(li => li.id),
+        libraryItemIdsFinished: libraryItemsFinished.map(li => li.id),
+        isFinished: libraryItemsFinished.length >= libraryItemsInSeries.length
+      }
+    }
+
+    if (include.includes('rssfeed')) {
+      const feedObj = this.rssFeedManager.findFeedForEntityId(seriesJson.id)
+      seriesJson.rssFeed = feedObj?.toJSONMinified() || null
+    }
+
+    res.json(seriesJson)
+  }
+
   // api/libraries/:id/collections
   async getCollectionsForLibrary(req, res) {
     const libraryItems = req.libraryItems
@@ -859,7 +901,7 @@ class LibraryController {
   middleware(req, res, next) {
     if (!req.user.checkCanAccessLibrary(req.params.id)) {
       Logger.warn(`[LibraryController] Library ${req.params.id} not accessible to user ${req.user.username}`)
-      return res.sendStatus(404)
+      return res.sendStatus(403)
     }
 
     const library = Database.libraries.find(lib => lib.id === req.params.id)
diff --git a/server/controllers/SeriesController.js b/server/controllers/SeriesController.js
index 9b05d406..41f44b4b 100644
--- a/server/controllers/SeriesController.js
+++ b/server/controllers/SeriesController.js
@@ -5,6 +5,16 @@ const Database = require('../Database')
 class SeriesController {
   constructor() { }
 
+  /**
+   * @deprecated
+   * /api/series/:id
+   * 
+   * TODO: Update mobile app to use /api/libraries/:id/series/:seriesId API route instead
+   * Series are not library specific so we need to know what the library id is 
+   * 
+   * @param {*} req 
+   * @param {*} res 
+   */
   async findOne(req, res) {
     const include = (req.query.include || '').split(',').map(v => v.trim()).filter(v => !!v)
 
@@ -29,7 +39,7 @@ class SeriesController {
       seriesJson.rssFeed = feedObj?.toJSONMinified() || null
     }
 
-    return res.json(seriesJson)
+    res.json(seriesJson)
   }
 
   async search(req, res) {
@@ -56,9 +66,13 @@ class SeriesController {
     const series = Database.series.find(se => se.id === req.params.id)
     if (!series) return res.sendStatus(404)
 
-    const libraryItemsInSeries = Database.libraryItems.filter(li => li.media.metadata.hasSeries?.(series.id))
-    if (libraryItemsInSeries.some(li => !req.user.checkCanAccessLibrary(li.libraryId))) {
-      Logger.warn(`[SeriesController] User attempted to access series "${series.id}" without access to the library`, req.user)
+    /**
+     * Filter out any library items not accessible to user
+     */
+    const libraryItems = Database.libraryItems.filter(li => li.media.metadata.hasSeries?.(series.id))
+    const libraryItemsAccessible = libraryItems.filter(req.user.checkCanAccessLibraryItem)
+    if (libraryItems.length && !libraryItemsAccessible.length) {
+      Logger.warn(`[SeriesController] User attempted to access series "${series.id}" without access to any of the books`, req.user)
       return res.sendStatus(403)
     }
 
@@ -71,7 +85,7 @@ class SeriesController {
     }
 
     req.series = series
-    req.libraryItemsInSeries = libraryItemsInSeries
+    req.libraryItemsInSeries = libraryItemsAccessible
     next()
   }
 }
diff --git a/server/routers/ApiRouter.js b/server/routers/ApiRouter.js
index 1df7ff02..58237ce0 100644
--- a/server/routers/ApiRouter.js
+++ b/server/routers/ApiRouter.js
@@ -78,6 +78,7 @@ class ApiRouter {
     this.router.delete('/libraries/:id/issues', LibraryController.middleware.bind(this), LibraryController.removeLibraryItemsWithIssues.bind(this))
     this.router.get('/libraries/:id/episode-downloads', LibraryController.middleware.bind(this), LibraryController.getEpisodeDownloadQueue.bind(this))
     this.router.get('/libraries/:id/series', LibraryController.middleware.bind(this), LibraryController.getAllSeriesForLibrary.bind(this))
+    this.router.get('/libraries/:id/series/:seriesId', LibraryController.middleware.bind(this), LibraryController.getSeriesForLibrary.bind(this))
     this.router.get('/libraries/:id/collections', LibraryController.middleware.bind(this), LibraryController.getCollectionsForLibrary.bind(this))
     this.router.get('/libraries/:id/playlists', LibraryController.middleware.bind(this), LibraryController.getUserPlaylistsForLibrary.bind(this))
     this.router.get('/libraries/:id/albums', LibraryController.middleware.bind(this), LibraryController.getAlbumsForLibrary.bind(this))