I just spent part of the morning on a call with a more senior apple support guy after it was escalated. He was aware that other users are reporting it.
The first step is to see if it replicates while using the computer in safe mode (which I'm going to do this morning). He seemed to think that the problem may lie with migration assistant vs clean install, and that migration assistant is bringing over stuff (caches, buried start up issues, library files and so on) that is causing the problem.
This may explain why some people are getting it and others are not.
Solution offered was:
1. SMC reset
2. Boot in safe mode
3. Play around in safe mode
4. If the issue clears in safe mode, then restart in normal, as safe mode can clear some stuff.
5. If issue doesn't clear in normal, but did in safe, then reinstall MacOS and clean install everything.
6. If this doesn't resolve then it will escalated further.
Anyone do a clean install of everything and still have the problem?
no migration assistant and have a clean install and i still have issues