As I've said in my previous message, the scenery works fine in FSX and worked fine in all previous P3D version, and the buildings are 100% FSX SDK compliant (P3D 2.x dropped some compatibility with FS8/9 SDK objects, but this is not the case), so it's seems something that it's outside our control and should be fixed by LM.
We'll probably update LSZH in the future, like we did with JFK V2, so it's *possible* that either LM would have this fixed in the meantime, or switching to newer programming methods we used in later sceneries will, but it's not something we started yet, because there are other more pressing updates like KLAS and KORD first.