Then we’re experiencing the same bug probably. We should report it.
As a quick fix for now, instead of having to reboot the whole system you can just run on a dom0 terminal (XFCE Terminal).
qvm-run sys-net "pkill nm-applet; nm-applet"
The above will run pkill nm-applet; nm-applet on sys-net. Essentially killing the the network manager applet and restarting it.
Just to see if it happens on a specific environment:
- are you running on i3wm? (If you have no idea, then you’re probably on XFCE – the default)