Why would that be a bug? Isn't that your actual altitude when over a an object? If you were in a hover, wouldn't you want to know how far you can descend before you collide with an obstruction? That is working as intended.
Has anyone else come across an issue where you mark targets for you JDAMS on the F10 map but when you go to load the targets from the knee board, you load other targets set by another Harrier or F-18?
What is DCS World Early Access?
Early Access is an option for you to play this module in an early state, but it will be incomplete with bugs.
No one forced you to buy a module still in development. Just say'n.