Pen F firmware upgrade causes problems

I bought a new Pen F last month, and promptly upgraded to firmware 2.0. Then I had a series of camera failures. It would just go dark, as if the battery had died. But taking the battery out and putting it right back in would reset the camera, and show plenty of charge on the battery. Every shooting session this would happen a few times. I thought I was the only one, but then I discovered this thread on DP Review:

Re: Olympus PEN-F lock-up / freeze / unresponsive after updating the firmware to version 2.0: Micro Four Thirds Talk Forum: Digital Photography Review

There's a guy in Germany who has figured out how to downgrade to the prior firmware, and that solves the problem.

https://lightsnowdev.com/Olympus

There is the usual corporate failure to acknowledge the problem, although some say a corrective update is coming in June. Otherwise, I love the camera.

I've had my PEN-F for over a year. I just checked and have firmware 1.0. I never registered the camera -- I guess that's why Olympus did not notify me to upgrade.

What was the upgrade supposed to add or correct?

Here's Olympus' explanation of the upgrade for 2.0.

Olympus announces significant firmware updates for OM-D and PEN cameras

Now there is 2.1 to solve one of the problems created by 2.0. Without actually acknowledging the problem (unlike Leica's recent T2 recall) they did fix the software in a few months.