The same thing has been happening to me it has cost me games. What is the problem
Screen Freezing.
This happens to mee all the time on chess.com. It usually gets worse the longer i am on the website. I have lost an untold number of games due to not being able to move the pieces!!! And like Achente above, somehow my clock never freezes - it just keeps ticking off time while I try desperately to get my pieces to move. It's ridculous.
Note that this problem was first noted 9 months ago, and no one from chess.com has bothered to give a reply, much less fix the problem. That's pathetic.
I have been playing Chess on live all day and everytime, it keeps freezing the screen so I can't move my pieces. While this is going on, my clock keeps running. I just barely won a game with 52 seconds left. This is making me very angry and I want to know what is going on.