I've seen something similar when replaying the 'Black Death' benchmark track. Sometimes while playing that track, in the shot where you see the bombs fall on the line of aircraft, only one of the bombs bounces, while at other times several of them do. Also on the same track, in the shot in which the AA gunner is seen firing, sometimes the rounds loaded into the top of the gun can't be seen.
I don't know of a solution, other than to try replaying the track again in the hope it gets loaded up properly. I obviously don't know what's causing it either, other than that there's something going astray when the track gets 'built' in the player. It does seem similar to the way there were inaccuracies in the tracks recorded in the old IL-2 series as well, wherein what you saw at the time of the recording wasn't always how the .trk file replayed it later.
On a related note, are you getting the engine-revving bug too? For me that's an even more fundamental problem with the replays that definitely needs to be fixed if the replays are to serve even their most basic purpose of showing what the player's plane was doing at the time of recording.
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