this is the 5th or 6th thread on this.
Replays are not accurate. The plane never died in the actual attack. If it was still alive and the replay showed it as having been killed then when deployed again it shows as a plane with full health.
this is a replay bug. Not an extra plane bug. Replays are not replays. They are re-enactments but the museum is not taken into account correctly so they are almost worthless. Unless you see the extra plane on the map at the same time as the others it is legit.