FantasyPlayer + Voicemeeter

Hi there,
I am using the player together with Voicemeeter, but I have a problem regarding the speaker modes.
When I select anything higher than Stereo (in my case 5.1 Surround), the Voicemeter Virtual Input (Voicemeeter Aux) is only recieving stereo signals.
(Voicemeeter Aux has been configured in Windows 10 as a 5.1 Speaker Setup).
Is there something I oversee?