TTY started by lxc-console freeze after logging out

I’m on openSUSE Leap 15.1 container. After I ran lxc-start and lxc-console -t1, or even just lxc-start -F, and login on the prompt, then immediately run exit, the whole tty would stuck. Any operation won’t make it show any echo. I have to repick another tty and rerun lxc-console -t2 for e.g… Have totally no idea on debugging it. Any information would be appreciated.