I then thought to try the mirror. I switched it to the left position and it adjusted the right one, and right position adjusted the left one
Weirdly it returned back to normal after about 10 minutes - how it should operate.
I thought it maybe a oneoff but the same thing happened again today from cold start. Anyone else had the same issue on electrically controlled windows and mirrors? and any ideas as to what this may be?
It doesn't do this everytime. Just did this randomly