Help 355 Spider Windows/Roof odd behaviour

Day 2 of our European tour Yesterday and due to bad weather we were driving with the roof up, traveling at around 100MPH and hit a ridge or bump in the road and suddenly both windows dropped about 1.5", the same as they do when you push the roof back when lowering it, It did it 5 or 6 times at speeds of 95 to 120MPH. Does anybody have any idea why?

I'm guessing there is a microswitch somewhere that needs adjusting. Not sure if it's related but when raising the roof, should the windows go back up fully when the cycle is complete, ie front rail latched and seats returned to original position as mine don't?

limited Internet access but will check back in later tonight/tomorrow


thanks

 

The microswitch is just above your sun visor (remove both sun visors and unscrew the convertible top latches to gain access to it behind the leather interior that runs along the top of the windshield)...it's on the left side of U.S. cars. Not sure about UK variants.