When launching games from the games tab in PiTool, the VR centring commands for any given game or application (DCS for example) only work on the left/right and forward/back axis, the up/down axis does not centre and the headset stays aligned at the height at which it was when the game or application was launched.
If the game or application is launched from its own desktop shortcut, centering works on all axis.
Pimax 5K XR with V2.1.255.220
PiTool V1.0.1.132
Using 1 HTC Base Station