Sorry to say... these are too expensive to let that problem persist and not have it repaired, especially when it is under warrantee. It may be a good idea to buy an extra used back fo a back up. I had to have one of my backs rebuilt by Hasselblad so it is not uncommon on an older back, but I have never had this happen on a new one.
I would, if I were you, prefer to have Hasselblad do the work.
Good luck with it.