Viggen freeze during looping

[TOViper]

I have to add that it is not required to fly a full loop in order to get the freeze.
Today I flew 70° nose up, then rolled half, and went down. After reaching normal flight attitude the sim stopped (was a reverse half cuban eight).

[CaptCrash]

My post from a while ago just had a slight pitch change maybe 5 degrees either side of vertical and that is what did it