Pitch drawing tool stops responding at random

At times, the pitch line drawing tool doesn’t seem to work.

I cannot say why, as it seems to happen at random, no pattern whatsoever.

I tried to replicate it in the video, as this happened to me on another unrelated session as I was tuning a cover yesterday, and it seems like it has something to do with one of the 3 on/off switches (probably the Enable Direct Pitch one?). It happens more frequently especially if you use either parameter (regardless if said parameter is Breathiness, Pitch, etc.) and line at the same time.

The closest thing to a clue I can give you guys is that sometimes it happens after errors like this.

But even the type of errors (if you get an error prompt at all) that trigger this bug aren’t always one and the same.