Rocks/Geomes not loading in some regions worldwide

ISSUE DESCRIPTION

Description of the issue:

Geomes/Rocks are not popping up at remote locations like pacific islands (e.g. TT02). Neither can they be placed via Developer Mode (they’re just not showing, also after building). There seems to be a bug with the lithological classes that don’t allow a fallback beyond defined regions.

A similar issue applied for grass till SU2 beta, for more details see:

Did you experience this issue before you joined the Beta?

Yes.

ICAO, coordinates, or specific location:

TT02