Setup: Whonix (default configuration) on Virtualbox 5.10
I repeatedly encounter this problem in my Whonix workstation in which the graphics / user interface renders the workstation unusable and requiring a reboot. It does not happen immediately, but begins after some use (15 minutes plus)
I have tinkered with the RAM, graphics allocation only.
Otherwise, I do not have the prerequisite knowledge to provide further troubleshooting information.
I have attached a screenshot to help illustrate the problem.