I haven't had that problem. One thing I do though is disable animations and sounds. That helps with lag for me at least
Premoving problem?

Yes i also made a forum topic for this. Here is the link

I found out the way to deal with this is by playing on /live. Therefore chess.com please DO NOT remove /live, /play still have some bugs inside it, it is not perfect and it can't replace /live

I found out the way to deal with this is by playing on /live. Therefore chess.com please DO NOT remove /live, /play still have some bugs inside it, it is not perfect and it can't replace /live
They decided to make it disappear forever

@GBTGBA Nah I don't think beta is on iOS. You can only do one premove at a time on iOS.
I recently turned on the beta mode, and I started having premoving problems. This is basically what happen when I premove:
1. I make a premove
2. My opponent plays a move, the move appears on the notation tab, but the position doesn't change and my premove is not played (my opponent's move doesn't even appear on the board)
3. I have to abort the premove and replay it, costing me around 2 seconds every time. This doesn't sound like a lot of time, but it is very bad when I play bullet, which is my favorite time control.
If anyone has the same problems as me I would love to know how you dealt with it or fixed it. Chess.com already ignored me on the email so I hope you guys could help me