Xbox Series X Tsw3 Sherman Hill: Cheyenne - Laramie, Get Over It Scenario Glitch

I'm struggling with Sherman Hill: Cheyenne - Laramie, Get Over It scenario, I've uncoupled from my train, driven along the track, pulled the other train over the hill, uncoupled from it and then the map shows my route into the sidings to complete the objective, however the points wont change onto the siding,I've tried stopping before the signal and holding B to contact the signaler, driving straight on eventually leads to a red signal without any other route I could take to return to the siding.

I replayed the mission and have encountered the same issue again.

Any suggestions?