This sounds very much like what was going on in version 70b3. I just helped someone roll back from that to 68.6.0 and that was fine. I am on the release channel and when I just checked I'm updating, and have been updated to 68.7.0.
While it would be odd for any major change in a dot level release, it could be some small change has triggered this, as accessibility testing is spotty at best (as a general rule).
I don't have time at the moment to fire up NVDA and listen, but if you can provide just a couple of the things being said that weren't before, I will do that later and see if I have them, too.
Brian - Windows 10 Pro, 64-Bit, Version 1909, Build 18363
Power is being told you're not loved and not being destroyed by it.