nVidia AR Move only executes if attached to source is displayed in OBS

[LagaV]

I have a (simple) "nVidia AR move" filter attached to one camera source.

Based on the resulting "Direction vector X" I enable or disable a scene that includes this source. Looking into this camera the scene with this source is enabled, looking somewhere else, the scene is disabled (and showing a different camera layered deeper in the stack.

Everything works fine until the "AR move" source is not displayed in any way (Preview windows for the source, multiview windows open or displayed in Preview of the OBS Studio main window and this window not minimized.