Flat roof export issue

Hi everybody, as we just started working with Speckle we are new in this domain. While exporting from Revit I met and issue. Flat roof with variable layer designed for water disposal has not been exported at all. Nor via Categories nor via Views filter. Slab edge has been exported only by View filter, Categories ignore them. Does anybody met such an issue before?

Please share a sample file with a minimal reproduction. We don’t need project data just something that replicates the issue reliably.

This is dropbox share only with your forum email: 260405 - Flat Roof Error