WW2 fighters won't attack bombers

[Gunfreak]

I made one mission, where the attacking fighters behaved strangly, but thought it might have something to do with being night time. But I made another one and the same thing happens. I had to put 2 Spitfire flights on intercept because on CAP they would just attack the fighter escort. But on intercept they almost never attack, and if they attack they do one half hearted attack then they end up just flying in loose formation with the bombers. Or flying ahead of them.

I've gone through the mission 7 times now and not once did 8 spitfires manage to shoot down even 1 bomber, and of the 7 times only once did they even do one attack on the bombers.

 

Bomber intercept.miz