ID 579018 - Animations exported in .gltf/.glb file formats are inconsistent with the original animation

Problem summary
Animations exported in .gltf/.glb file formats are inconsistent with the original animation

Customer reported version
Modo 17.0v5

Customer reported platform
macOS 14 (Sonoma)

Steps to reproduce

1) Open Modo.

2) Create a primitive cube.

3) Navigate to the Animate Viewport Layout.

4) With the cube selected in item mode, activate auto-keying on the Move, Rotate and Scale Channels.

5) Using Move, Scale and Rotate (W, R and E respectively) create a simple animation along 20-50 frames. For example, move the playhead on the timeline along intervals of 5 frames, and use the Move, Scale and Rotate tools to move the cube around the 3D viewport. The auto-keying will automatically record any changes you have made.

6) Once this animation is complete, navigate to File > Export As.... In the dropdown menu under Save as type:, choose glTF v2 .gltf (*. gltf).

7) Repeat the export steps, but save as a glTF v2 .glb (*.glb) file.

8) Open the .gltf/.glb files in a glTF viewer (eg. https://gltf-viewer.donmccurdy.com/) or another program such as Blender 4.1.

Expected behaviour
The animation in the .gltf/.glb files should be the same as the animations keyed in Modo.

Actual behaviour
Errors/inconsistencies can be observed, like strange rotations or different transforms.

Workaround
Unknown.

Reproduced by support
This bug has been reproduced in:

Modo 17.0v5 - Windows 11 - Linux Rocky 9 - macOS 12 Monterey
Modo 16.0v1 - Windows 11
Modo 15.0v1 - Windows 11 - Linux CentOS 7 - macOS 12 Monterey

Earliest version tested
Modo 15.0v1 - Windows 11 - Linux CentOS 7 - macOS 12 Monterey

- This issue appears to be in all tested versions of the product

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