Aseprite cursor lag

[dacap]

Check a possible solution here:

Massive Pen Lag/Delay

It looks like a general performance issue (not related to the input device). Just in case, are you using a 4K monitor or a big resolution? Could you please tell me if the performance improve if you reduce the window size? Another option is trying different Screen Scaling option in Edit > Preferences > General > Screen Scaling = 100%, 300%, or 400%