Hey there. So got a weird one. When my Windows 10 PC resumes from sleep I have to unlock it, after that the screens appear as before but then a few seconds later they all go black for a maybe a second, then they are all redrawn.
Everything redraws back to what it was, except for OneNote. The ribbon on OneNote (for desktop) starts out fine, but after the screens go blank and come back it flickers and the ribbon buttons and items all vanish (except for the Font name and size!).
The only way to get the ribbon back is to restart OneNote. But if I run my mouse over the top of the ribbon then almost all the items are redrawn as the mouse passes over the top. But not all of them.
This doesn't seem, to happen to any other Office apps, just OneNote. I am unsure of the screens going blank briefly is normal after coming out of sleep mode, but it doesn't seem to impact anything else.

Things I have tried that didn't help:
- Repair and update Office (when the latest update to the 2021 equivalent version happened I thought it was fixed, but the problem returned a day later)
- Update Windows
- Repair Windows system files (sfc, etc).
- Disable any apps/services that could be impacting with display (e.g. I run DisplayFusion Pro)
- Wait for a bit before unlocking the PC - this just seems to mean the screen blanking happens at the login screen and when I unlock the desktop OneNote is missing the Ribbon buttons.
- Disable the only OneNote add-in I had running (NoteHIghlightAddIn)
- EDIT: Disable hardware graphics acceleration
System Details
- Windows 10 Pro Version 20H2 Installed on 28/06/2021
- OS build19042.1348 Experience Windows Feature Experience Pack 120.2212.3920.0
- Microsoft® OneNote® for Microsoft 365 MSO (Version 2111 Build 16.0.14701.20040) 64-bit
- Processor Intel(R) Core(TM) i7-10700K CPU @ 3.80GHz 3.79 GHz
- Installed RAM 32.0 GB
- System type 64-bit operating system, x64-based processor
- Video: Nvidia 2070 Super with 3 monitors attached
Any thing else I can try before I blow away Office and then maybe Windows and do a clean install?