added check before setting state

android/app/src/main/java/com/audiobookshelf/app/managers/SleepTimerManager.kt

@@ -366,7 +366,8 @@ class SleepTimerManager constructor(private val playerNotificationService: Playe
           setSleepTimer(deviceSettings.sleepTimerLength, false)
         }
       } else {
-        isFirstAutoSleepTimer = true
+        if !isFirstAutoSleepTimer:
+          isFirstAutoSleepTimer = true
         Log.d(tag, "Current hour $currentHour is NOT between ${deviceSettings.autoSleepTimerStartTime} and ${deviceSettings.autoSleepTimerEndTime}")
       }
     }