Harmony stops responding whenever I try drawing

Whenever I try to draw anything, the program stops responding. It switches over to the white drawing tab, which is then blank, for a couple of seconds before it goes back to normal showing the newly drawn line. Sometimes this will happen multiple times before the full line is shown.
Everything else seems fine, I can copy and paste frames, create new layers, and import audio and stuff without experiencing this.

I’ve also used the demo before getting the program and didn’t have this problem.