I have a mk1-3 capsule. then the planetside 1.25m-0.9375m adapter then one of benjee's ports

I had assumed that the passthrough on the adapter part was what was breaking it, but there is a piece of code that tries to find hatches in connected parts.

Turns out this part wasn't using passthrough at all, and because it was using the empty iva shell there was no collider bounds to detect overlap with the kerbal.

Hah! Glad its (hopefully) fixed now!