You are right and it is not you.
A next month run starts about once in 4 hours.
most days are 9 minutes. in some cases 12 minutes.
30 or 31 days take longer than 4 hours and most months are cut short but it is hard to notice.
except for one gap between two game months which is 6 hours. This gives us some time for maintenance when needed without disturbing the processing.
in that case, the last day of the month ends after about 5 hours and sits there for a long time before the next month begins.