its a huge problem in Footprints-3D.
Place 3-D model (doesent matter of txpe: step or wrl) - all still ok. But try to correct the placement (Offset/Rotation) lets dissapear the model (even if try to move ti 1mm or less). Model is no more present at all…
By the way, I hardly miss “browse” feature in symbol library for finding right footprint too…
Best regards from Germany,