M1 Mini blank display issue band-aid solution (works for me)

Setup: M1 Mini 16 + 5K UltraFine display via TB3 + Big Sur 11.0.1

Issues: 1) Display stays blank after sleep, 2) display randomly goes blank (as if "no power" blank, like someone pulled the plug from the wall), 3) unresponsive Brightness controls (either from Preferences or Keyboard), 4) Display preferences won't stick (for example, when I chose Resolution: Scaled and I close the prefs panel, it resets to Default when I go back)

Frequency: Can happen every 2 minutes, or 2 hours, or 2 days, pretty random stuff

Band-aid solution: 1) I prevent it from sleeping via Energy Saver 2) I leave the System Preferences open, specifically on the Display prefs (the tab with Resolution options, Brightness, Rotation, etc). When not using the mini I just activate the screen saver with a hot corner and reduce Brightness to its lowest

Result: Issue hasn't occured for the past 24 hours and I've worked yesterday evening and most of the day today.

Hope this helps, I can only speak from personal experience and it works for me.

Imho, a Big Sur update should fix the problem because it doesn't "behave" like some usual hardware issue.

Otherwise, I'm really happy with the Mini. Fantastic machine.