I’m having a similar issue with one particular 2021 CFH model plug. I found it off-line with a rapid flash status light. Re-powering did not help. All I did was re-add it with the same name and it was working again. I did this yesterday. At the same time I updated to the latest stable.
Today I find it in the exact same situation. I don’t recall for sure the last time, but this time I found it with a slower flash. It changed to a rapid flash after re-powering it. Again I just re-add to the app like normal and it’s working again.
So it seems to be self-resetting itself. Has the hardware gone bad? It’s just some months old. I made a log ID after getting it to work again, 488177.