Gmail accounts won’t stay logged in?

Been messing with some Gmail accounts lately. just basic stuff. login. check inbox. scroll around a bit.
But they don’t stay logged in. Few hours later I open the same browser, and suddenly I’m signed out. Some accounts ask for verification again. Some just load a blank screen.
No 2FA. No IP change. Cookies still there. Same setup every time.
Is this normal? Or am I doing something dumb without realizing?

Not sure but maybe Gmail doesn’t just look at IP or cookies. If the browser looks too different next time, it might just log you out. I think using something like Hidemyacc or Multilogin helps keep things more stable. Worth testing.