Wow, this actually happened to my parents during our visit on the 18th and I forgot to mention it. On that occasion, the gatekeeper was not at his/her post, so the train had to grind to a halt underneath the waterboggin. Their train, however, was able to make it back to the station eventually without a huge roll-back. I guess the Czech train is more powerful than the Ford's.
The real question is, what's going on with the gatekeepers? Are the crowds just getting backed up more than normal in that area these days? Methinks a new system is on the way.