I'm using a MacBook Air 2019 to run this game on chrome and it's been a few days since I started this game, the mouse worked fine until today suddenly it was not playable with the mouse, there's input lag but the major thing is the cursor itself teleporting around where I try to move it to, it works very normally if it's not in-game, I saw this by using the in-game mouse, it lags around every time, even small movements, there's one more issue, when I move the mouse and when it lags(always) the game lags with it for no reason, when I use my touchpad it's really smooth as it's meant to be so it's not the laptop that's the problem nor the mouse, I tried solutions from other answers but none of them worked I couldn't find anything so I came here.
@Mot I'm not quite familiar with Mac, so can't really test. But maybe there's new update/driver for the mouse?
i had this issue earlier with PUBG, along with connectivity issues that seemed to be server side. I had a fine connection here and also have had no issues the past few days. it suddenly started working after about 30 minutes. so maybe glitch/server connectivity issue.
I had the same issue on my PC the other day. I tried everything but finally just closed the Chrome browser and reopened it and loaded Stadia. That seemed to fix it and it hasn't happened again.