Do you have the same issue if you follow the OP’s steps to reproduce it?
yes
Provide extra information to complete the original description of the issue:
I completed the entire LFBD - KSEA flight, departure in Cold and Dark and stopping the engines on arrival.
This flight was made entirely at night.
This flight is planned in the Frequent Flyer “achievement”, but does not appear there.
It is well noted in my logbook, it appears in the “night owl” achievements
I noted that the night departure is at “zero” even though it actually took place at night.
If relevant, provide additional screenshots/video:
