I also registered an account for this and would like to add a little information. I am M1 max, version 3.0 and 3.1alpha. My situation is that it will not flicker under normal circumstances, but if an external drawing board is connected and the pen is used as the mouse mode, it will start to flicker. At first, I found this problem in the engraving mode. Later, I found that as long as the pen is used, it will flicker