The problem is that for the past week, I’ve been experiencing the same issue in cargo missions. If this issue occurs at the helipad, I’m still somewhat okay with it because I can somehow activate the next task. However, at the start of cargo missions, this bug becomes impossible to manage.
I already have to carefully select cargo missions by checking the drop-off zone each time because the mission generator often assigns drop-off locations that are unmanageable (due to steep slopes). On top of that, if you cancel a mission because of this bug, you can’t even replay it since it disappears from the mission selection menu (!!!).