this was actually reported to me on discord, even the exact same game if i recall correctly lol. for some reason, sometimes games with anti cheats make pngRemix freak out and lag. i think it is a godot thing, since godot is very very weird when it comes to stuff like this, like for example disabling the mouse tracking when the mouse is locked by another game, etc..
i will still try finding some way to be fair, since it is one of these issues that really bothers me