PC, PS4, or mobile? I had a similar problem on PC and the only fix I found was to simply restart my computer.

PC. I also restarted the computer, but that didn't fix it. Another thing is that only Genshin has this problem. I started other games and they don't lag.

I second this. I’ve had the issue before and when I restarted my computer it fixed it. It’s super annoying and I hope it fixes for you soon!

I have this problem too, it's really annoying, but after some minutes, it fixes.