First, are you using time compression? If so, how fast? You haven't provided any information at all, so it would be helpful if you did so.
Also, there are a number of "no jumps allowed" topics in the Support forum. Possibly there is one or 2 of those threads that will nail down the explanation.
Also, there are a number of "no jumps allowed" topics in the Support forum. Possibly there is one or 2 of those threads that will nail down the explanation.
See FsPassengers Frequently Asked Questions: FAQ