[BUG] Multiple audio files being played in parallel

[webzit]

Steps to reproduce

1. Play an audio file (1) in the OCIS app
2. Pause audio file (1) played in the OCIS app
3. Lock iPhone screen
4. Resume playing the audio file (1) from the lock screen
5. Stop playing the audio file (1) from the lock screen
6. Open OCIS app
7. Play a different audio file (2) in the OCIS app
8. Pause audio file (2) played in the OCIS app
9. Lock iPhone screen
10. Resume playing the audio from the lock screen -> Multiple audio files (1 and 2) being played in parallel

Expected behavior

Only the audio file that was last played in the OCIS app should be played

Actual behavior

Multiple audio files being played in parallel

Client

iOS version: 16.6.1

ownCloud app version: 12.0.3 Build 282

Device model: iPhone 13

Logs

If needed, i am happy to share the logs (please provide a link)

(Two other bugs that have nothing to do with this bug, but I encountered as well: 1. play audio file in OCIS app, 2. stop audio file in OCIS app; 3. terminate OCIS App (not just back to home screen); 4: Start OCIS App -> [BUG 1]: OCIS plays the last audio file by itself and [BUG 2]: the back button is grayed out)