This is different from it being offline, it's like the device is kicked off the associated account. A "something went wrong" window pops up with a "generate device code" button, with instructions on how to remove and re-pair the headset.
There is no way to even access wifi settings or anything else to disconnect the device from the internet. If it's still a problem much later in the day, I'll try turning off my router to see what that does.
Interesting. I had a problem a few months ago with DNS not resolving Meta servers on my Starlink internet connection, but I was able to use the UI and the apps nonetheless, just couldn't open the store or update firmware.
Seems like they really did change something in the latest firmwares.
There is no way to even access wifi settings or anything else to disconnect the device from the internet. If it's still a problem much later in the day, I'll try turning off my router to see what that does.