Need someone who's extremely well-versed in bodyslide/outfit studio

[T0ggle]

So this has happened to me a few times now. I'm doing a CBBE to 3BBB conversion in outfit studio. The method I use is exactly the one that's posted in the description of the 3BBB download page. So there's no confusion as to what that process is:::

Open in Outfit Studio, Delete CBBE  body, Add project (the SE 3BBB Amazing.osp).
"Bones" tab Delete from project if present: NPC L Breast, NPC R Breast, NPC L Breast01,  NPC R Breast01
 but DON'T delete: L Breast01, L Breast02, L Breast03, R Breast01, R Breast02, R Breast03
Meshes Tab, Select all armor and "Copy Bone Weights".
Then deselect all sliders except "Labiapuffyness" & "CBPC" hit CTRL + C & click ok, then Save Project. 
**If you get an Unweighted Vertices warning when saving, Select all clothes, then right-click and click the Mask Weighted Vertices.  **And then copy bone-weights again. At this time, run Search Radius to 9.

 

After I save, I open in bodyslide and this happens,

(note: this doesn't happen every time, it has only happened a few times)

I'm just wondering wtf makes this happen.

 

 

Now when I open it back up in outfit studio it looks normal, thats what really confuses me.

I'm not sure what it looks in game, but if this is any indication i assume it would probably spit out a CTD. 

I'll go and check right now.

Any help with this would greatly appreciated.