So earlier today I was flying from San Francisco to Helsinki on the A350, as I was taxing to the runway 28L my plane suddenly collapses or seems to have fallen in a ditch. I reset the flight in confusion, instead I took a different taxi route, same thing happens, I collapse. I don’t know what it is. Is it the airport or the plane? It was definitely frustrating, all I want to do is get up in the air!