omega ring continues in the public version

Hi, it depends what ring you are in. Currently there is no insider build for Beta, Delta and Omega rings, this means you will be on the current public build.

Instead of leaving the Xbox Insider program as one Ambassador has suggested you can drop down to a lower ring which receives much fewer updates. For example if you are in Beta ring drop down to Delta or Omega. The Omega ring receives the fewest updates,
usually just before it is released to the general public. This can be managed using the Xbox Insider Hub on your console.

That is actually not a bad idea. Staying in the Omega ring has very low risk. But in case something does go wrong, one can still revert the firmware update if it was still an omega version. And then block firmware updates until a fix is available.

The main issue with this broken firmware release is that there is no way to roll back to an older firmware version.

In my understanding the Dashboard experiment, A, B, C selection, is totally random.

As "Both consoles say their OS Version is (19h1_release_xbox_dev_1911.191028-1335)" your consoles are either in the Beta or Delta ring.

Both those rings and Omega ring are getting a preview update News release notes Beta Delta Omega
Insiders today, which you can manually start or wait until it becomes mandatory.

After you do the update, if you want to change rings, it will be the perfect time to change as all those rings will be on the same release. Subject to eligibility.

I’m on the Omega Preview ring (omega is issued updates very soon before they hit general public and is easy for anyone to join). I received an update last night and it appears all HDR Black levels are fixed for Blu-Ray, Amazon HDR, etc. However that pesky
Netflix “always-on” HDR issue still persists, but that’s a different story. So if it hasn’t already I would think this should be pushed out to public very soon!