(Depthbuffer)MXAO works incorrectly in some angles

Depthbuffer disappears when you turn the camera to some certain angles
Try this: Look down at your feet in Unturned, the depth displays the sky and such

What is the game ?

Unturned and WOW, you can try it.
It's easier to find out in unturned, just look down, and depthbuffer will become weird

Some games show weird behaviour on the depth buffer in certain conditions. For example otherwise perfect DB but when a mirror comes in view, the DB inverts or vanishes. Max Payne was one of those games, if I remember right. There's not much you can do, because it's a problem in the game and not in Reshade. If the game uses DX10 or higher, you can change the depth buffer in the last tab of the configurator. It may or may not help. There's currently no way of doing anything in DX9 games.

Although it's been a few years since the last comment here, I've been having the exact issue in Kerbal Space Program. I've tried selecting the check box to 'copy depth buffer before clear operation' and for the most part it's worked, however now the depth buffer flickers regularly when the craft is stationary but the flickering almost completely stops when moving. Not sure if there is a fix for this one?

This is a problem with The Sims 4 too. Moving the camera up or down changes the depth detection so all depth effects become stronger closer, and the correct settings only apply when the camera is looking ahead in quite a narrow angle range. It's been this way for a couple of years, it wasn't always so. It has persisted across 3.x - 4.x versions, and none of the various depth buffer settings seem to have an impact.

The game has two camera modes - live mode (that you use to play the game), and tab/camera mode (that you activate to get rid of the hud and to get freer movement for taking screenshots). The depth buffer is calculated differently between the two modes, and it's really only in tab/camera mode this difference in depth is noticeable.