Same problem

its a bug restart mission and turn on the plane it will work eventually

I fixed problem, but it's not really the fix of problem 'cause i-tgt work only in singleplayer and don't work in mp "Zeus"

Is there any way to fix this or it's an addon issue?

Would be nice if I-tgt had some ACE 3 integration or something. I don't have enough experience coding to try myself though.

I have a problem with ITGT not showing any of missiles/bombs under pylons in list menu and I start mission fully loaded, what can cause this problem?:c when I had played previously it was working fine

You have to spawn jet with ITGT through 3den editor. Or use Virtual garage, works too. It will not work through ZEUS .