U save a game, while having firebird in air flying to a misison, then when u recover, you can find that the firebird is not in air, and that there no mission anymore, but within a seconds of game time, the mission appears right where it used to be when you were saving.
And if you command firebird to go there, it start his fly not from base, but from the point where it was upon game save.
It gives no much problems but...
If you loaded, and decided to change crew or ammunition ofthe crew, and then you order firebird to fly to reappeared mission, you will get at mission unchaged crew, and game crush after fe turns of the mission, caused by somethign like "slot" error.