Hey
@nafis007
I actually have the same issue on a MacBook Air M1, and from what I've gathered from my tests, this is actually an issue of the Keychron K3 pro keyboard.
Whenever I enter a video call on my MacBook (Google Meet or Slack huddle), my mouse cursor starts lagging hard.
I thought it was the mouse at first, but upon trying another mouse I had the same problem
I thought it was the AirPods Pro I was using but using other headphones led to the same situation.
Note that unplugging one of the 3 devices would solve the problem
Then I tried with a Keychron K2 keyboard, and the issue disappeared. So this is clearly due to the K3 Pro, it seems it's using too much bluetooth Bandwith or something.
I haven't found a solution yet, for now I'm either using the keyboard via a cable, or using the mouse via the Logi+ dongle.