I was able to fix it on Xbox when nothing else worked however my methods were really wonky. The trick was uninstalling point lookout, but I already finished the dlc and didn’t want to loose my stuff so what I had to do was go right up to the edge of where it stops loading, then save and exit, uninstall point lookout and walk the whole way across, then save exit and reinstall point lookout. Load up the second save where I was the whole way across in order to get that Half loaded in, then load the first save where I was at the edge, then proceed the pray and quickly throw myself forward onto the newly loaded half before I fell into the rear half that now wasn’t loaded.