I had this same exact problem. It ended up being CBBE (Caliente's Beautiful Body Enhancer). I tried rebuilding the .nif files in BodySlide, but that didn't help. I ended up (in MO2) going to the mod files of CBBE and deleting the boots and gauntlet meshes at "Caliente's Beautiful Bodies Enhancer\meshes\armor\dragonscale" and "Caliente's Beautiful Bodies Enhancer\meshes\armor\dragonbone". Hopefully this works for you, and hopefully this is just something that needs to be patched in CBBE, because I have no idea what would be causing this besides that.
