So far I've only noticed it happening on the allied side. I'm flying a German career at the moment and it doesn't appear to be occuring.
It's happened with large and small formations and I first noticed it when performing a balloon attack with 56 sqn. However it has also happend with line patrols.
I don't have any mission files to check at the moment as I tend to delete them once the mission is done. However, I will set up another 56 sqn career and see if I can replicate it. Should be able to take a look one evening this week.
Unfortunately I don't know anything about the mission editor so would not know what to look for in that.
