Our Revit expert @connor is on leave today. In the meantime, you can create an issue on Github for this. We’ll take a look at it on Monday. Thanks for reporting it and sharing the file. It really helps.
I just stumbled up with this 6 year old Revit Library and I intended to bring it on Speckle, I was still investigating before pushing this error on GitHub, hope The group will soon come back to discuss or accidentally someone discovered:
It is a helpful test case, for while it inadvisable for building information models to include many of this class of component, Speckle is also used by fabricators who need 1:1 fidelity transfer of prototypes etc.