I'm playing in a 720p window (to see timer and stuff cause i don't have 2 creens ;( and sometimes, as you can see in the video, when i go back to the hub it's all distorted and it's really annoying and disturbing my run. What causes this?

Seems this happens if you're using F11 lag

The thing is I only use cube chambering so no lag is involved. But restarting the game several times helps it seems.

This happens when I change my resolution in game. Restarting the game fixes it.