Dropdown is rendering underneath the rest of the content

My dropdown is rendering underneath the rest of the content in Preview mode (see attached image).

The dropdown frame/component is already at the top of the layer hierarchy, so I don’t think it’s a simple layer order issue. I’ve also checked the parent frames and, as far as I can tell, there’s no clipping/“Clip content” configuration causing it.

This only happens in Preview mode. Inside the editor everything looks correct.

Has anyone experienced something similar with overlays/dropdowns being rendered behind other elements in Prototype/Preview? Could this be related to nested frames, absolute positioning, auto layout, or some prototype rendering limitation/bug?

Would really appreciate any insight 🙏