Since the 6/4 update VRML files don’t import reliably, i.e. I can’t find an example that works more than partially, and most aren’t read at all. No error message, just little or nothing is imported.
A file with spheres and cylinders that worked before and fails now: foo.zip (2.6 KB)
I understand why this worked and then got broken again. I made an initial fix. I asked a senior developer why the fix I made was necessary. He showed me the error of my ways and recommended some additional changes. It was in those changes that I introduced a new, different bug. To the end user it would appear the same as the original, both caused failures but for different reasons. See notes on https://mcneel.myjetbrains.com/youtrack/issue/RH-47341 for specifics.