Sometimes convois do not fit into a station of the right length. I found this with PakBritain road trains with 4 trailers. all have length=4, hence the vehicle should fit into one tile stations. However, this is not the case if the convoi goes north or west.
The patch fixes this. If a convoi enters a station it now drives until the first vehicle arrives at the station end. The routine was right if the first vehicle has length=8, but for shorter vehicles the first vehicle did not drive to the end of the tile, but stops before.
Screenshot 1: old behavior, the tile before the station is occupied by the last vehicle in the convoi
Screenshot 2: patched, now the vehicle alignment is broken, which imho was tuned to the old but buggy routine