SU 27 Radar/Rockets bugged

It happened many times since 2 days, i m locked on target and he doesnt flair or even tryes to avoid the ER rocket, and half way my rocket turns to the ground and flyes toward it. I heard its not only SU’s problem but in general? i mean 1 week ago i had 0 problems and now its 50/50 it hits or not

forgot to add, sometimes it just flyes throw the target with no hit, when its 100% hit