Can someone fix this Body Slider Issue with Wolverine please

Here's the problem.  His mesh for the costume can't be grabbed or resized with the body slider.  He's forever thin.   You bulk him up, slap the outfit on him, and he becomes thin and you can't grab it again to change it off of him.  I heard that possibly when things don't work with body sliders, that it's an error with a UV1 or something, but I have no idea what that is.  Also, it seems that he works for some people, but not for others, and I don't know why.  Is it possible for someone to fix him a bit so that he works universally?  Is he outdated for current Sims 4 updates?  I really don't know what to do with him.
his other pieces seem to work fine, just the main body piece.  This is also the only piece of CC I have this problem with, so I don't think it's my system, but then again, what do I know?

Any help would be appreciated more than you know because I know I'm not the only one with this issue.
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