I recently discovered that if you move left or backwards and close chatbox with the next station, walking, looking around and teleporting will freeze. It only works for these 2 directions, it doesn't affect the other.
Maybe it has something to do with the fact that these 2 directions can be "overwritten" by walking in the opposite direction, for example: when you go left (holding "A") you can press "S" to go right, but the opposite is not possible.
Here is a video and log from the game, hope that helps.
2023-08-24 14-19-14.mp4
SimRail_log_2023-08-24_14-16-03.txt