Interface freezes midgame

This has happened twice in the past few minutes and more than that since the past 2/3 days. What happens is that in the middle of a game I just cant move my pieces, everything seems frozen. Reloading page is the only way out.

Thought I should let you know.

Next time it happens, please open the browser console (F12) and take a screenshot. It will help.

...this happens to me all the time. Even in a Blitz I have to reload 4-5 times.

Next time it happens, please open the browser console (F12) and take a screenshot. It will help us troubleshoot this issue.