... but it still doesnt make complete sense, seeing as lap one the tyres are coldest and car is heaviest and I had no issues on the same line until lap 8.
Another factor is downforce, the quicker you go the lower you ride.
Maybe lap 8 was that unhappy medium with enough fuel weight
and quick enough for the extra downforce?
I ran my posted setup on hard tyres and never experienced it through out all my driving there.
My set has stiffer springs to allow the F22mm & R38mm ride height and keep the hard tyres hot