Start from the launch pad. Then do steps until you get to the second stage. Tap fast forward. Whenever you press the fast forward button it stays at normal speed. This is also happening when I try to pause the game, slow motion it and it does that while writing the body of this. This happens after gravity turning to 70 degrees at about 7,000 meters. It keeps happening after SECO (second engine cutoff) and second engine separation.