I just repaired the disconnected back button using a thin wire, but it is important to be solved - I just assembled one of the watchy - I think it is an issue on board - there is a missing trace between the button and ESP32, although there is some trace. It is pin GPIO_8.

I just repaired the disconnected back button using a thin wire, but it is important to be solved - I just assembled one of the watchy - I think it is an issue on board - there is a missing trace between the button and ESP32, although there is some trace. It is pin GPIO_8.