Seatbelt jammed

[NorfolkAndGood]

Hi, anyone had a seatbelt jam and not retract. I stretched the rear passenger seatbelt to full for transporting stuff and it won't retract. It's not very accessible but can't see anything twisted so think its just locked. Has anyone had this and know if this is covered by warranty. I've asked the question of MG too but just wanted to see if others had had similar issues in case they are funny about it. If there is an obvious fix too, welcome to any suggestions. 2023 MG5 LR facelift model

 

[Alb]

I've not come across this.
Might be best to leave it as a warranty repair.