Roof interference (or just effects of a full moon)

Probably my most stupid question of the day and I'm prepared for some ridicule but in the last 6 months my roof has failed in the half-open position on two occasions and subsequently needed resetting at dealer. Maybe nothing unusual in this (although having a Alfa Spider for 4 years with no such failures it's disappointing) - but strangely both happened at lunchtime within 50mtrs of each other.

Without me going back to the same location (not usually one I frequent) to test the theory and risking another dealer trip has anyone experienced localised interference that may have caused this or have I just had bad luck ?

Went to dealer as I was passing and they did it for free so no ££££ saving but now I'm going to go away and read the manual again.

Understand re the different faults and I'll deal with those when they give me the fault codes (I'm back on Mon for something else)

I had the first diesel in the country and was pleasantly surprised (but I've also heard the horror stories from others) - if only it had 4 seats I'd have another in a flash