ID 563583 - Export Dialog window is empty for Channel nodes in Ptex Projects

Problem summary
Export Dialog window is empty for Channel nodes in Ptex Projects
 
Customer reported version
Mari 6.0v2
 
Customer reported platform
RHEL 9
 
Steps to reproduce

1. Launch Mari
    
2. Create a Ptex Project by selecting Force Ptex as the Mapping Scheme setting of the New Project window.
    
3. Select one of the Channel nodes automatically generated upon Project creation and right-click > File > Export

 
Expected behaviour
The Export Dialog window should appear:
 

 
Actual behaviour
An Empty pop-up window appears:
 

 
Workaround
The Export Manager can be used to export Channels instead of the Export Dialog.
If the user wishes to export a Ptex Channel node without using the Export Manager, their best option is to create a Bake Point node directly upstream or downstream of the Channel node, bake it, and export that instead of the Channel node. 
Alternatively, they could select Channels palette > [channel name] > right-click > Export Flattened > Export Current Channel Flattened. However, this action is designed to be used with Layers, so it may not always work well with node-based Projects.
 
Reproduced by support
This bug has been reproduced in:
Mari 7.0v1 - Windows 10 - Rocky 9
Mari 6.0v2 - Windows 10 - CentOS 7
Mari 4.2v1 - Windows 10 - CentOS 7
 
Earliest version tested
Mari 4.2v1 - This issue appears to be in all tested versions of the product