As I said, since you got a higher frame rate your GPU was under more stress. This is not a "new" issue, rather we optimized osu! to be able to go faster, which made your PC stumble. Please upload the skin in question, though, then I can check for myself if it causes problems for me.
fujger wrote:Yes, it helped, but it never happened before, so i think that it's a new issue. Try to run any map with Azerino's skins.