"play" and "shuffle and play" won't add songs with Bilibili source to playlist

[sonnyding1]

Website (required)

VocaDB

Describe the bug (required)

When I hit "play" and "shuffle and play" in a song list with both songs with YouTube source and songs with Bilibili source, only the songs with YouTube source are added to the playlist.

To Reproduce (optional)

Steps to reproduce the behavior:

1. Create a new song list
2. Add a song with YouTube source
3. Add a song with Bilibili source
4. Hit "play" and "shuffle and play"

Expected behavior (optional)

Songs with Bilibili source should be added to the playlists, too.

Desktop (optional)

• OS: Windows
• Browser: Chrome, Edge

Checklist (required)

Fill out the checklist. Use strikethroughs or leave fields empty if you don't know or are unable to check/test.

• Searched VocaDB/vocadb for duplicate issues.
• [ ] Tested on the beta site. it says bad request
• Tested on different browsers (e.g. Firefox, Chrome, Safari, Edge).
• Checked in private mode.
• Cleared browser cache and cookies.
• Checked the DevTools console. Nothing printed in the console when I play a song list with only songs from Bilibili.
• [ ] Checked the syslog (mods+ only).