I exported some STEP files today - all watertight polysurfaces. None of them were defined as Blocks within the Rhino file (I rarely use Blocks).
I always import back into a clean Rhino file before sending to make sure the export is good. Today I noticed that they were coming in as Blocks, and none of the polysurface edges were joined. I don’t recall seeing this before. Is this behaviour as expected or have I accidently changed something without realising?