I first noticed AI having landing issues in 1.5.8 with some A-10C and M-2000C campaign missions and my wingmen not being able to land. Being at the end of the missions, it would be an annoying track to view.
Here I've got a track from the A-10C OPF campaign mission 2. At the beginning a Yak-40 and C-130 both need to land before you can take off.
The Yak overshoots initial runway alignment, but gets down eventually with a heck of a crab into a not very strong crosswind.
The C-130 though also overshoots, but then looks to initiates what might be a go-around and then gets stuck in this loop of ugly approach, waveoff, another ugly approach, etc. Its never able to land and the mission can't continue.
This probably breaks a number of other various campaigns out there.
Edit: track is 10MB, can't upload. Posted on google drive: https://drive.google.com/open?id=194-tP6ZGJKcuJzhBxIhItMNuXBgm8aqE