ID 386759 - Exports are inconsistent and missing mesh items when exporting selected layers with a hierarchy using the Autodesk FBX 2015 settings.

Problem summary:
Exports are inconsistent and missing mesh items when exporting selected layers with a hierarchy using the Autodesk FBX 2015 settings.
 

Customer reported version:
modo.12.2v2

Customer reported platform:
windows10

Steps to reproduce:
1) In Modo, load the attached project.

2) Create the FBX settings in the Preferences menu as follows:

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3) Close the Preferences, then select the mesh item for Top_Square.

4) Right-click the item and select Export Selected layers.

5) Choose format settings for Autodesk FBX 2015, then click OK.

6) Select a directory and save the file, observing the file size.

7) Repeat steps 4-6 until a different file size is created.

8) Open the file in Modo and observe the available mesh items.

Expected behavior:
The export should complete with full mesh information.

Actual behavior:
Mesh items were missing after exporting using the Autodesk FBX 2015 option.

Workaround:
Exporting using the Autodesk FBX 2018 format seems to negate the issue. 

Reproduced by Support in:
Modo 13.0v1 - Windows 10
Modo 12.2v2 - Windows 10
Modo 12.1v1 - Windows 10
Modo 12.0v1 - Windows 10
Modo 11.2v3 - Windows 10 
Modo 11.2v1 - Windows 10 - regression
 

Earliest version tested:
Modo 11.1v1 - Windows 10 - A dialog box previously warned the user about missing information if it was unsupported. This is no longer present in 11.2v1+