Drones don't respect assigned altitude

[NightMan]

Gentlemen;

I am trying to put up a mission with a few drones with AFAC as task.

Either if I tell them to Orbit over an area or to "AFAC - Assigned Group", I always tell them to stay at 22000 ft, even in the Orbit Task.

The problem is that after a while they decide to start descending down to around 14000 ft and they get shot down by SAMs.

Why are they deciding to descend?

Teste de exequibilidade.miz