battlefield 4 attack jet shift boosting not working please fix

hi guy i having a issues i been like 3 hour and my attack jets boosting shift not working.

i have answered ea live help

i tried ccleaner and repair  battlefield 4 games but still not working

Notice😕tealth jet boosting still working and i have no idea.

actually it could be a bug problem for some reason why i can't do jet rotate to evade jet enemy here because i can't shift for good speed to evade jet. that reason i think it would be bug but some people. can Do attack jets boosting shift.But me there a reason why my keyboard or in game bug.all my running shift running speed running working but expect for attack jets it could be a problem so please Fix this bug.

Thanks

Bad news:i feel bad when my kill/death raito is going down ☹️... like it going get worst :C

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Kyubey~