[arch-general] VBoxWebsrv has trouble exiting itself

Recently I found my system(Gnome+Nvidia+bumblebee) freezes sometimes during powering off, so I checked the systemsd log, and it shows that vboxwebsrv timed out(took about a minute to be killed). I disabled vboxwebsrv, everything seems okay now. Has anyone experienced this too ? If it were a bug, I think the developers should be informed.