I was just about to put up a post about this problem.
ive been unable to fill surveys since the last update on mobile,nearly a week.
I was still able to do them on wgt.com ,until yesterday.
I contacted wgt a couple of days ago,giving a bit of time maybe sort the problem.
as usual there's been no reply.
maybe there's a problem with peanut labs,as there was a year ago with unity adds.
yet again wgt are treating players like mushrooms.