I noted the same thing. Was fighting a P-51 near our CV. He flew into the ack and lost major pieces of his plane, then crashed.
I flew over to the enemy airbase right next to the Cv, watched the P-51 re-up, with no right wing and no tail. Was so funny I let him up and fly around watching him just below me. He was flying in full control. Finally another countryman came over and took him out.
Apparently the last damage occasionally gets cached in memory, but does not affect flight.