I just started setting up a new corne wireless build and one of the nice nano v2s doesn't seem to accept new firmware. it seems to disconnect before the full firmware is copied on to it. It's stuck on a keymap that i've flashed on it at some point when i was iterating on my layout.
I've been trying to reset it using the default firmware from the typeractive.xyz documentation page from when I first flashed it.
I've tried:
1. different usb cables
2. different computers
3. swapping the boards the microcontrollers are on (left <--> right) swap.
4. connecting only the microcontroller and using the reset to ground pin method.
the other nice!nano microcontroller is flashing fine, so I think my setup is working correctly.