Finger Messed Up in Custom Mesh (MD)?

I'm at the tail end of finishing this fully body outfit and I keep encountering this issue:

It's only affecting the right hand's pinky, so of course I check the weights for that group set in Blender but everything looks normal. I've checked other weight groups to just see if somehow it got funky when transferring weights from an EA mesh. Nothing came up, vertex paint is alright, and moving the rig in the Blender with the mesh shows nothing. I've read previous threads mentioning the CUT numbers, but I'm 99% certain I did those as well... If anyone could look at the .blend file or package and help figure out what's going on, it'd be much appreciated!

Blend File: drive.google.com/file/d/1PlEX44hg7F1BlQEsVZncFhyGUv3Fj-5v/view?usp=sharing
Package File: drive.google.com/file/d/1Oag5vABWbZc7NQ6a14OUQf7p_fqfqIIE/view?usp=sharing

I have also tried throwing it through CASTools, but the results were very... Rough, so to speak...