Tie Advanced not renewing target lock on ships that had it when he comes from RI

Yep, I specifically made sure that one of the ships had Target Lock before calling in TIE Advanced x1 in the battle then attacked other ships and waited for Target Lock to expire on the ship which had it before reinforcement was called in. When that Target Lock expired it got renewed (you can notice it by the red text "Target Lock" appearing). Again I didn't attack that ship meanwhile.