pop up roof

[jts46]

Their we were travelling on the A10 between Paris & Orleans at a steady 110 km per hour (68mph), when suddenly we noticed it was very windy in cabin. The front left side of roof had lifted about 3 to 4 inches, pulled over and tried to raise roof but too dangerous and windy. So crawled to an aire, raised roof to inspect for damage none found, roof lowered and locked. Raised and lowered roof 3 times and all was well. Continued journey with speed up to 130km per hour and no further problem.
This was on Friday 14th, could it have been a combination of road speed and wind speed?

Has this happened to anyone else?

John