I'm trying to create this shirt that's meant to look like a strawberry. instead of adding the green parts as just the texture, I actually made them 3D on the mesh. I have green parts lining the neck and the sleeves. the neck works perfectly fine, but the sleeves won't morph with the arms, and despite all of the seams lining up, they look separated in game. to top it off, the bottom of the shirt does not move with the pelvis despite the weights being there! I've been struggling with this top for MONTHS, and I really don't know what I could possibly be doing wrong.
blend and package files: https://1drv.ms/f/s!Alg_w_piyWUqgSqRI0gnHKhB1-q1