Gnome logs me out when connecting to external monitor [Ubuntu 21.10, Dell XPS 9310]

I'm using a USB-C hub to connect power and a hdmi external display to my laptop, which means easy connection with one cable. However, whenever I connect it gnome will revert me to the login screen. And after I log in all my windows are gone, it's a new session.

Also, often when I disconnect the monitor, the system will restart.

I've tried disabling extensions but no difference.

Any Ideas?