I experienced the same thing, however I used my prawn suit to get to the cave. I was veeeeeeery frustrated that I already spent 18 hours in the game and now couldnt get anywhere.
I had a bug when disconecting my prawsuit from the seatruck to get up on land (Arcic spires). I got up on land with the prawnsuit but it was tilted 45 degrees to the right. For an hour or so I explored Arctic spires walking around lika that. FIxet i…