Seems to be when I am trimming. Happens several times a day. Spinning beach ball, force quit is only way out.
Running on Monterrey, most source is AVCI MXF from Sony cameras.
Updated from v22.4 to fix the shuttling bug (which it has done) and the flickering/disappering waveforms (which it has not). Going back to v22.4, considering v22.3.