Bug Hub 3.1.1 Screen blank when loading in background

Environment:

• Hub 3.1.1 (also happened in previous Hub 3 versions)
• Windows 10

Reproduction:

• Open Unity Hub and click over to an unrelated window that obscures the Hub window before Hub has opened.
• Click back to Hub. The window is blank:
  
  
• To refresh the Hub window, I need to minimize and restore, or refresh the screen.

(Apologies if this has been reported already. A quick search didn't turn up anything.)