Comfort access handle partial failure?

[JBF]

Looks like the capacitive sensors on my rear drivers side door handle have stopped working. Bit odd -

• Key battery is fine because the other doors work as expected
• Not that I have the key too far away, still fails if I have the key in my hand right next to the handle
• Hall effect sensor still works as when I pull the handle the door unlocks - also suggests there's nothing wrong with the key or antenna in the door handle

Seems odd that both capacitive sensors in the door have gone at the same time - both lock and unlock. Is this common? Anything I can try before booking in to be replaced? It's under warranty so that's fine just going to be a pain finding the time to take it in.


JF