Strange behavior after deleting all (partially) watched videos in playlists

[vkay94]

Checklist

• [x] I am using the latest version - 0.20.6
• [x] I checked, but didn't find any duplicates (open OR closed) of this issue in the repo.
• [x] I have read the contribution guidelines given at https://github.com/TeamNewPipe/NewPipe/blob/HEAD/.github/CONTRIBUTING.md.
• [x] This issue contains only one bug. I will open one issue for every bug report I want to file.

Steps to reproduce the bug

1. Create a playlist with some (partially) watched videos and not-watched ones.
2. Open the options menu on the top and choose "Yes and partially watched videos" (third option)

3a. Start to play one video. 3b. Open the options menu and choose "Yes" (first option)

Actual behaviour

After 3a: The video is removed from the list immediately and all items are updating very often. After 3b: The old items are appearing again (even if the optiion says "it can't be undone xD)

Expected behavior

3a: The video should not disappear/deleted from list. 3b: The videos shouldn't re-appear again (in this case there shouldn't be any difference after third option action)

Screenshots/Screen recordings

Logs

Device info

• Android version/Custom ROM version: Android 10 (LineageOS 17.1)
• Device model: S4

PS:

I've already looked into it a little bit and one reason could be that the remove action doesn't delete items from the database and which is the reason for 3b (after deleting only references instead of the actual items from the database, another loading from the table will load the old list).

You can assign me to this issue, @opusforlife2 , but I can already tell that there might be some structure changes.