The grid is not flat, the result may be unexpected

minimalex
minimalex
in BricsCAD BIM

I got the following message when exporting sections (_BIMSECTIONUPDATE), and sections seems to be exporting okay. I am worried that I may get errors down the line that I don't expect. Anyone else have this message?

"Error occurred when processing AcDb3dSolid 5ABDA: BREP error 3021
The grid is not flat, the result may be unexpected"