The offsets are applied after toggling positional tracking off, so that the view does not jump at that moment. But when changing the base pose, keeping that offset doesn't make sense. Especially with landmarks, which are supposed to give precise positions/rotations to jump to. For that part the VR Scene Inspection Add-on will need a little adjustment though. Also exposes an explicit function to the Python API to reset the offsets, to be used by the Add-on. This is mostly untested since I don't have access to an HMD currently.