Version: 1.7.27.0
Frequency: Consistently
Severity: Blocker
Bug description: AO (UV2) is not exported. Addon 6.4.9 blender 3.6.15
Repro steps: Create a cube, create a 2UV, create an AO map for the second UV, export
Hello @miron ,
I checked with the sample that was shared by @DA40CGDFQ here
and I could not reproduce the issue using blender 3.6.23 , SDK 1.6.9 with the addon version 6.4.9.
Can you share with us your .blend (with packed textures) and .gltf / please ?
See 3) Provide private content
Any warning / error in the blender console ?
Hello @Boris
I just did some additional testing and it works for me! 
I will update this thread if I encounter this error again.
Thank you!
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This bug report has been marked as obsolete.
Hello @Boris , I can confirm that I encountered an error again.
On a small test scene with the cube everything is fine, but on large scenes the error returns. It simply ignores the AO map export. But this particular map is not exported to the textures folder and to the engine. Please do additional research. Unfortunately I cannot provide my files.
The only thing that helped me was going back to addon version 5.4.4. On this version, AO(uv2) export works correctly.
Hello @miron,
Without any file to reproduce the issue, it will be hard for us to investigate.
However, please make sure you check every object in your scene and verify that UV2 is not selected. If UV2 is selected, it will be treated as UV1.
For example, here:
This is incorrect because UV2 is active, so the exporter will assume that UV2 = UV1.
You need to make sure that UV1 is active, and not UV2, for each object.
Let me know if it fixes your issue