Fellow disappointed Microsoft Customers, I reached out to Microsoft 365 Tech Support because this happens to absolutely everything on my PC that requires a password.
1. It is a known issue
2. They said try the local account thing suggested above-it did not work for me
3. No idea when a patch will arrive
4. Refused to answer any questions about refunds since I now spend a bunch of time everyday logging in repeatedly
For your info:
1. Firefox does not seem to suffer from whatever this is
2. Thunderbird does not seem to suffer from whatever this is
I am still signing back into OneDrive multiple times/day. I gave up on Chrome, Edge and Outlook