Substance High Poly to Low Poly clipping

Hi

Back in substance after a while and I'm getting clipping between low poly and high poly mesh after baking mesh maps.

It's a basic T-shirt in blender. The high poly is the exact same model but with multires modifer to sculpt some wrinkles. I exported the high poly model with multires mod applied and exported the low poly model with multires mod removed. Not sure why there should be clipping like this?

Here's how they look in blender:

I've tested each them on their own and they texture fine separately with no issues.