Duplicate songs appear in playlist and cannot be re-added after removal

[vipworld1555-byte]

Hello, I found a bug in SimpMusic related to adding songs to a playlist.
When I add a song to a playlist, sometimes it appears twice (duplicated) in the playlist.
I tried to remove the playlist and add the song again, but it can’t be added anymore — the app says it’s already in the playlist even though it’s not visible anymore.

I also tried restoring backup data, but the issue still remains.

Steps to reproduce:

1. Add a song to a playlist.
2. Check the playlist — sometimes the song appears twice.
3. Remove the song or the playlist.
4. Try to add the same song again — it won’t add.

Expected behavior:
The song should appear only once in the playlist, and if removed, it should be possible to re-add it.

Actual behavior:
Duplicate songs appear in the playlist, and after removing, songs can’t be added again.

Environment:

App: SimpMusic (please specify version if possible)

Device: (POCO F6)

OS: (Android)

Additional notes:
I already tried restoring backup data, but it didn’t fix the problem.

[Ctrl-sza18]

This is caused if you add the song twice to the playlist for the playlist part you should Force Stop the app and try adding the song

[montessor8-design]

This is caused if you add the song twice to the playlist for the playlist part you should Force Stop the app and try adding the song

I also have the same issue. It seems that the app randomly duplicates song from local playlists rather than adding the song twice. Additionally, force stopping the app still doesn't allow me to add the song😭. Any other suggestion for fixes?