[BUG]: Random videos in watchlist after starting video in private playlist

[niceconic]

Checklist

• [X] I made sure that there are no existing issues - open or closed - which I could contribute my information to.
• [X] I have read the FAQ and my problem isn't listed.
• [X] I have taken the time to fill in all the required details. I understand that the bug report will be dismissed otherwise.
• [X] This issue contains only one bug.

Affected version

Any version I've Chosen, beta or stable

Device Type

Smart TV/Box

Affected Android

Google TV, OS Version 12

Steps to reproduce the bug

1. Start any video in any self-made playlist (on Googlte TV, not tested on fire tv)

Actual behavior

contents of playlist are not in watchlist

Additional information

Device: Chromecast HD with Google TV

Edit: The Issue appears if the playlist is set to private. Every public and not-listed playlist appears no to have this issue

[alicj]

I have similar problem. When I add a playlist to the sidebar, if the playlist contains only music videos, accessing the playlist from sidebar would show random other videos and playlists somewhat related to the music already in the playlist. When accessing the playlist from playlist tab the random videos don’t show up.