At the time I removed the micro controller to investigate the issue and noticed that for some reason the pin 011 was not getting current.
As I was used to charge it with a magsafe style magnetic charger I accepted the fact that perhaps that could have caused a damage to this pin on the chip or something like that and ordered a new nine!nano.
When the new nice!nano arrived I just had to flash reset my right half and then flash the firmware again so both half could properly communicate with each other.
Everything started to work again, but that only lasted 1 month.
Yesterday the battery of the left half was getting close to 20% and I decided to plug the usb-c cable (I haven't been using magnetic charger anymore), and coincidentally or not the left half on the thumb keys stopped working again. So the magnetic charger not necessarily was the culprit the first time the issue happened.
I am quite disappointed to be honest to face the same issue. I have another wired Corne that I built myself years ago which to this date never failed while this Bluetooth one failed once again in such a short period.
Would like to know if anyone else ever faced the same issue. I am not sure if trying to re-flash the firmware could fix this as my assumption is that the charging should not affect whatever is stored in the flash memory.
Will attach 2 short videos showing the issues. The 2 main symptoms I can notice are: - Left half thumb keys doesn't work at all. - When I turn on the left half, sometimes it turns on with the Base layer activated, and sometimes it turns on with the Lower layer activated