SVF2 format retrieves missing or incorrect data from Model Derivative on IFC and RVT

This question is connected another issue which I’ve posted before here: Inconsistent data.

When models are uploaded with SVF2 format, Model Derivative brings wrong data like (IfcGUID on externalId field or names on externalId field instead of real external id) or msising data like (names without [Revit ID], missing properties). But from viewer with SELECTION_CHANGED_EVENT right data and structure can be seen without any issue.

When the models are uploaded with older version SVF format there are no problems.

What could be the real issue here, should we not use SVF2 yet ?