Ju-87 stuck at low altitudes even if waypoints set high

[RedZone91Mickeys91]

Hello I started a Ju-87 career on Stalingrad as I love dive bombing. I noticed that some of the missions will have the waypoints set for 4000 meters for some of my waypoints flight and attack runs. But issue is the Ai Ju-87 flight lead I’m following will not go over 600ish meters entire flight from take off, attack and landing eve though on the map and waypoint marker are set way higher . I tried to manually change altitude and still nothing.  Is this a IL2 Ai issue? Or am I doing something wrong? Do I have to lead the flight instead?