What did you do? / What happened?
With this savefileI placed a single rail piece unconnected to any other rails whilst trains were crossing the big junction and a number of trains repathed causing them to stop suddenly.
NB The junction is controlled by CN controlled signals (aka traffic lights) and it appears that when the rail is placed the trains repath and lose their path reservation.
Here is a little video
Some (all?) of the trains also seen to briefly "no path" even though their original path is still valid even if there are red signals.
What did you expect to happen instead? It might be obvious to you, but do it anyway!
I dont think the trains should repath but even if they do, they shouldnt lose their path reservations.They should never stop in the middle of a junction except where there is no path for the train to continue.