I have another odd issue. I have my own layouts in the device, in 1,2,3.cfg. There is nothing defined in either of those layouts for when only the T1 thumb button is pressed. However, if I'm in one of those layouts and just press and release the T1 button (nothing else), the twiddler resets completely (red-green-blue LED simultaneously), loses bluetooth connection and also reverts to the default layout.
This does not happen in the default layout. Also, all chords that actually involve the T1 button work fine and do not reset anything. It's only when the button is hit all alone (which can happen accidentally).
I even tried with an empty config (except for the SYS standard buttons that get added automatically), same result.
And even if I over-define it with something else (e.g. T1 = <NumLock>, it still resets the twiddler, so the definition doesn't even get picked up).