We encountered this problem which is really slowing down development of airports. The bug happens as follows:
Package built with the fspackagetool.exe and copied to the Community folder, editing/moving nodes in the Scenery editor will quickly result in a CTD, very quickly after a few edits. The operation that seems to trigger the crash more frequently, is dragging the mouse to move a TaxiwayPoint node, especially if it has two or more paths connected to it. This crash is repeatable, and we tried it on 3 different PCs, all of them in 100% default installation with nothing else in the Community folder other than the scenery we are working on.
If the Community folder is empty, (only copy of the scenery active is the one mounted on the fly by the editor itself), seems to fix the CTD when editing nodes but, there's another bug: Projected Meshes disappear in chunks when raising the Developer camera, and they never reappear, regardless if we go back down to ground level. Even clicking Show/Hide buttons on the Projected Mesh objects doesn't make them to show up.
This makes working on an airport almost impossible because we clearly need the Projected Mesh to be visible in order to create matching Taxiway Points and Paths, but it disappears if the scenery is not already there in the Community folder, which in turn makes the sim to CTD after editing a few nodes.
Removing both the _PackageInt and Packages folder from the project folder to trigger a complete rebuild ( both externally with the fspackagetool.exe and from the "Build" button in the editor ) doesn't fix the problem.
The Console doesn't report any error, like missing textures or anything else, related to our package, both at load time and while editing too.
FYI, the airport contains 3 Projected Mesh objects. I mentioned because, a long while ago, one Sim Update caused airports with more than 2 Projected Mesh to disappear and crash the editor if edited. This was fixed long ago but, who knows, maybe there's a relationship.