Unlink timeline tracks

I’ve been using Kdenlive for a while on my PC running Linux Mint 20.3 Una. For a few days now, my application has not been responding correctly. It has become impossible for me to separate tracks from the timeline. Right-clicking on any track in the timeline doesn’t open any context menu allowing me to unlink tracks. Is there a configuration in the application settings that would prevent the tracks from being unlinked?

What do you mean with “unlink tracks”? Do you want to delete a track, or un-group clips or separate the video and audio streams of a source clip?

Maybe there were some updates on Mint lately? Or you update to Linux Mint latest version 21.2 or use the AppImage.