Shopify AR App Not Rendering Object surfaces

We can add the .glb file in fine, and on the product page it looks fine. Completely rendered in, beautiful stuff. However, once you’re on mobile - you click “View In Your Space” the 3D Model will randomly not render surfaces. The object will become partially invisible.

We can’t pinpoint exactly what’s happening. We’ve uploaded the models to other AR viewers, and it’s completely fine. Like I mentioned, on the physical product page the model is fine. It’s just when you actually try to put a 3D model into the space, random parts of the model are invisible.

Anyone had these issues before? We’ve reached out to Shopify and now we’re waiting on the “Specialization Team” to respond - but I want to see if anyone in the community has had these issues.