My pals T5.1 camper did the same.Not done, but discovered today - presumably done last time I put the pop top down
View attachment 258700
Gutted. Barely six months old, and I'm really careful every time.
Only had some masking tape to hand, will attempt a proper repair job asap.
But I noted on my T6 there’s an elastic strap on the inside close to the very bottom of the pop top.
It runs across the van side to side and is attached to the canvas with clips.
This pulls the canvas in as it closes to prevent this happening