Sunroof issue

[V8cr]

Friends has nice t6 with sunroof . Oddity is the sunroof randomly tilts open and closed when driving along without touching anything .
Anyone else had this issue ?

 

[Robert]

I had exactly the same problem on my last Sharan. The sunroof would open or tilt randomly while driving.
The issue was caused by water getting on the sunroof controller.
Basically blocked drainage pipes caused water collection in the sunroof opening rim which then kept on spilling unnoticeably on the electronics causing abnormal behaviour.