Using classic Outlook for Windows in business environments
The first thing to resolving a problem is acknowledging there is a problem.
I see no indication that MS acknowledges the problem so no fix in the work.
One thing I will note, and it happened back on the 26th of August, I couldn't sync my OneNote from my computer or my phone. So I'll bet a change was made either on the 25th or 26th that created this. OneNote did get resolved although I never saw a formal resolution, it just started working.