Post interaction lag

just updated to
now whenever i do any changes in the sprite, after i finish, there’s a lag in the program

say i’m drawing long conteur with a 1 pixel sized pencil tool, all is good while drawing it, but after i let the left click go, theres a lag

This also happens after a single dot, or paint bucket tool

this issue comes and goes, but never happened before the update. i didn’t update the program in 7-8 months before this