that shouldn't happen and I'm suprised that somthing like this happened can I ask you was it at Sunderers you were trying to spawn (white truck symbol)
or a base (has you faction colour)? It may have been that the AMS sundy was destroyed while you were at deploy.
apart from that you can only really report it as a bug and try again. I would have thought it would have been found during beta though.
(edit I really need to quadruple read the post first
)