AliceLG Aden (Lookingglass for Blender)

[juzbot]

I am using alicelg (Lookingglass holographic display add-on) in blender game engine (UPBGE 0.3). Using a Lookingglass portrait in editor mode works smoothly like on Blender versions. How can i use the lookingglass during game/playmode? When I use it as camera (specific frustum) in play mode I see only a greyed out screen on the main view of UPBGE and the looking glass portrait freezes to the former main view (edit mode).
Any help / hint is highly welcome!

iMac Intel with Ventura 13.6
UPBGE 0.3
AliceLG 2.2 (see https://github.com/regcs/AliceLG)

Thx in advance!