Mobile redeploy mechanics in the fire

Hey, I've seen we can put the mobile redeploy by the zone now and it can still be active.

What I want to know is what's the mechanics for the plane and why my teammates sometimes die in the fire instantly. Is the plane goes always above the player, always above the redeploy, is it above random teammate or how does it work.

Not gonna lie, I feel like it is lottery now. It can be done in the fire, I'm in the middle of the zone and friends are dying in the fire.