I've noticed recently what i think is probably a bug with the syncing of multiple stations, particularly at least if not more than 3 stations. I had 4 racers synced up and ready to go and then i ran a test run. 3 of the 4 stations let the coaster go while the 4th just sat there. Once the next set of trains got to the front of the station in the 3 other rides the 4th station released its coaster and the other 3 stations did not. Since test running synced coasters was a bit buggy in the original game, i tried opening them to see if it would fix the issue. For the most part, it did fix the issue.