I think this is a result of my machine not being powerful enough to handle 40K passenger a day, but the auto planner started double booking flights a few times. This causes 5 hour delays regularly. Luckily it seems to happen at the small stands more than the larger ones. I have not manually planned any flights.
It has been happening over the last week at my current build.
I suspect it triggers when you have a very large airport with many stands and flights. I can’t exactly reproduce it from the editor but I have found a few minor possible “leaks” which could be related to the issue. Please let me know if it persist after next experimental release.
I am noticing rare cases when I place a flight manually, it gets scheduled for the next day or sometimes even on a day out of the scheduler.
Has this a relation?
Also when I want to shift a flight from one slot to another, I was a few times able to drop of on a blocked timeslot. Happened often when you have lots of stands and you need to scroll down.
(And in that topic: How do you shift a flight From A001 to Z999? You can’t grab it and scroll down. You have to place it several times on other stands to be able to scroll further down.)