torso or other parts disappear when ran through blender first

[Frisky-bits]

I need to run some models through blender to reparent bones but I don't mess with the mesh. HOWEVER, when I put it in XR Animator (as a vrm), parts of the model disappear. I have tested it where all I do is put the model in blender and then into XR Animator without changing anything and parts still disappear. I also tested directly importing the model into XR Animator straight from vroid and that works just fine so it's simply from running it through blender. Thank you in advance!