ending the process through Task Manager.
To me, it doesn't seem to be to do with memory or CPU issues. It also seems to only happen when I am actively using FL, not if it's running in the background. ...
FLStudio via File > Exit. I can also start and stop playback. So the status bar works, everything else is frozen.
Whenever I minimize and maximize FLStudio in that state, the unresponsive part will show a frozen image ...