If a static plane that is set as a spawn plane gets destroyed its wreck will remain on the spawn position, which results in new players spawning on top of it and being destroyed in the process.
I think it's the same problem we have on SOV. Saw now that the question has been already discussed. http://forum.1cpublishing.eu/showthread.php?t=35205
I can post the mission if needed. I have several of them,