Firstly, none of the waypoint markers are accurate. I had to google where to find the jetpacks on the mammoth because the waypoints were over 1km away.
Now, after I destroy the covenant ship (by googling the waypoint marker again because it’s way off in the distance), the mammoth drives onto invisible ground. Just un-rendered space with the skybox. When I have to continue on foot, I drop and the game returns me to the last save. No death animation. Same thing over and over again.