Anonymous opened the ticket and wrote:

I've just been converting my railways to monorail. I sent a train to the depot and already started converting the tracks. Well, I was faster than the train ;) and caught up with it on a long steel girder bridge (the red one). I clicked its base to convert it while the train was still on it, and guess what happened? I didn't get a 'train in the way' message, the bridge just converted, and the train stopped abruptly and started going the other way, even though the depot was the way it was going before.

Reported version: 0.4.7
Operating system: All

This issue was imported from FlySpray: https://bugs.openttd.org/task/238