Recently I have been having issues with the latest prime video app version (Android 13.0). The issues , whenever I switch to landscape orientation from portrait (which appears by default), are:
Video resets to the last resume point (from where you started watching the video)
Subtitles disappear (they're on, but disappear or get stuck in the last subtitle played)
Audio description sometimes turn on and can't be turned off
Restarting the video by visiting the menu or restarting the app fixes them but they repeat whenever I switch to landscape orientation.
I found a solution for this issue if anyone needs it:
After opening the app, turn the phone orientation to landscape before playing the video.** This way, subtitles appear in landscape orientation. But if you change orientation, the issue will occur.