JIPpers start where your switchable units are,so what can you do?
--Order your AI to stay in formation.
You need leader function.
JIP/Respawn is over when all Switchable Units are dead.
--Launch a script when a JIPper connects:
?(local server):onplayerconnected "[_name,_id] exec ""newplayer.sqs"""
in your init.sqs
Now in your script you can teleport the new player close to your position,
or parachute him behind you,or whatever your creativity can think of.