[LMMS 1.2.2, Linux Mint 20] UI is unclickable after a delay

[0xf0xx0]

Bug Summary

After loading in a VST and opening the GUI, LMMS appears to create some sort of invisible window that covers the entire screen. I can't even click my dock.

Steps to reproduce

1. Load in a VST
2. turn a couple knobs or play audio from the vst
3. profit ig

Expected behavior

I can tweak as usual.

Actual behavior

UI is blocked.

Screenshot

Cant take a screenshot of something that isnt there

Affected LMMS versions

1.2.2 stable

Logs

still have no idea how to get logs

Click to expand

[0xf0xx0]

i think i mightve found the issue? i ran the lmms command, and after the bug occurred i got this:

QObject::connect: Cannot connect (null)::subWindowActivated( QMdiSubWindow* ) to SubWindow::focusChanged( QMdiSubWindow* )

looks like its trying to do something with the windows and fails, basically blocking everything from getting input? i still have no idea how i was able to control+c the running process

[PhysSong]

Possible duplicate of #5104/#4885.

[PhysSong]

Closing as a duplicate of #4885.