Can you provide more details for looking into the issue please ?
Let us know the flash player version and whether you are using HTTP Dynamic Streaming or just streaming on HTTP. Is this behavior same with any FLV or just with one/some FLVs ?
You mentioned the buffer getting emptied, so do you also observe the Buffer.Empty messages before the Play.Stop or is it coming up abruptly ?
FMS is not in the picture and hence the specs for FMS will not be of use here.
Thank you !