Scene won't scrape from an alternate source

[SturmB]

I noticed that a scene I have downloaded didn't show up in XBVR. It's a No2StudioVR scene, but for some reason it isn't listed on SLR. It is listed on VRPorn, however: https://vrporn.com/at-the-bar-your-lucky-day/

I tried adding https://vrporn.com/studio/no2studiovr/ as an alternate scene source for No2StudioVR, but it still won't scrape that scene, even if I explicitly "Scrape Single Scene."

Strangely, if I add https://vrporn.com/studio/no2studiovr/ as a custom site (not choosing a "Main Site" when adding it), it will scrape that scene just fine, provided I use the "Scrape Single Scene" action.

I suppose I could just go with that second method to ensure the scene is added to XBVR, but it doesn't seem ideal. Is there any way to make it work as an alternate source instead? Or is there maybe a third option to make this work?