Large, Multipart Mesh Does Not Appear in Studio or Toolbox

BACKGROUND

Using the new mesh importer, I’m attempting to import a 4.5MB .fbx file of a level created in the Source Engine but ported into Blender.
It has:

  • 1,200 components/objects - albeit, there are only a total of 24,000 vertices because most of the level is simple components
  • 93 total textures in PNG format

The textures are packed in a separate folder in the correct directory and is recognized by the unified importer. There are 0 warnings or issues in the mesh importer preview window. I did convert the .tga files to .png in blender using a python script because the first issue during the first import was that the preview was black and white and failed to import (as a warning will tell you when using .tga files).

ISSUE

After doing the conversion to fix this issue, the mesh appears to successfully import after about 20 minutes with the message that it is in my toolbox and in the workspace but it appears in neither. It does not appear in my inventory either after any period of time. I’ve tried on two accounts and verified that the importer worked using a simple cube.

I have no idea whether or not this is a bug on ROBLOX’s side or if I’m doing something incorrectly. I have successfully imported a map before of the same number of mesh parts, though it was using Source2Roblox on GitHub and it uploads the textures and meshes over anywhere from 2 hours to 40 hours depending on the size of the map.

Are there any possible workarounds I should pursue or is this perhaps a ROBLOX glitch with larger many-part FBX files? Here is a link to the files gm_construct - Google Drive