Large playlist stuck in "Loading.." in flatpak version

[andrei-gheorghe-1978]

Describe the bug
When I try to load a large-ish playlist (121 tracks) it is "Loading..." forever

** Steps To Reproduce**

1. Click on a large playlist

Expected behavior
The playlist is loaded

Screenshots (if applicable)

System:

• OS: Oracle Linux 10
• Package: Flatpak
• Version 1.1.0

Additional context
Other playlists are being loaded just fine

[andrei-gheorghe-1978]

When starting the flatpak from the console I get this message when trying to load such a playlist:

'NoneType' object is not subscriptable

[juehang]

I believe this is connected to #217