diff --git a/server/models/PlaybackSession.js b/server/models/PlaybackSession.js
index 14303a036..26b702d8c 100644
--- a/server/models/PlaybackSession.js
+++ b/server/models/PlaybackSession.js
@@ -273,18 +273,20 @@ class PlaybackSession extends Model {
       if (!Array.isArray(findResult)) findResult = [findResult]
 
       for (const instance of findResult) {
+        const values = instance?.dataValues
+
         if (instance.mediaItemType === 'book' && instance.book !== undefined) {
           instance.mediaItem = instance.book
-          instance.dataValues.mediaItem = instance.dataValues.book
+          if (values) values.mediaItem = values.book
         } else if (instance.mediaItemType === 'podcastEpisode' && instance.podcastEpisode !== undefined) {
           instance.mediaItem = instance.podcastEpisode
-          instance.dataValues.mediaItem = instance.dataValues.podcastEpisode
+          if (values) values.mediaItem = values.podcastEpisode
         }
         // To prevent mistakes:
         delete instance.book
-        delete instance.dataValues.book
+        if (values) delete values.book
         delete instance.podcastEpisode
-        delete instance.dataValues.podcastEpisode
+        if (values) delete values.podcastEpisode
       }
     })
   }
diff --git a/server/routers/ApiRouter.js b/server/routers/ApiRouter.js
index 6487a2151..d6117a04e 100644
--- a/server/routers/ApiRouter.js
+++ b/server/routers/ApiRouter.js
@@ -583,10 +583,10 @@ class ApiRouter {
     if (includeRecentSessions) listeningStats.recentSessions = recentSessions
     listeningSessions.forEach((s) => {
       const libraryItemId = s.extraData?.libraryItemId || null
-      let sessionTimeListening = s.timeListening
-      if (typeof sessionTimeListening == 'string') {
-        sessionTimeListening = Number(sessionTimeListening)
-      }
+      const numericListening = Number(s.timeListening)
+      const sessionTimeListening = Number.isFinite(numericListening)
+        ? numericListening
+        : 0
 
       if (s.dayOfWeek) {
         if (!listeningStats.dayOfWeek[s.dayOfWeek]) listeningStats.dayOfWeek[s.dayOfWeek] = 0