Sorry to bring this back up again
It is happening again, and also sometimes the website just freezes. I can still go to other tabs, but on the calcudoku tab I can't do anything - I can't even scroll
So I had to go to a new tab just to be able to do this. It is incredibly frustrating.
EDIT: I switched computers (I think) and it's fine. It might also just be a time of day that's the problem, I just don't know
EDIT #2: There is an ad in the right side ad box that says "Advertisement: your video will begin in" and then a countdown. Whenever that ad is playing the downglitch thing happens, but as soon as the time is up it stops. It's weird that it says advertisement though