UV2 lightmap unwrap fails for glTF/glb on Android editor

[Mewlkor]

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Tested versions

Reproducible: 4.4.1-stable Android, 4.4.1-stable HorizonOS, 4.5-dev5 Android, 4.5-dev5 HorizonOS Not Reproducible: 4.4.1-stable Linux, 4.5-dev5 Linux

System information

Lenovo Tab P12, Meta Quest 3

Issue description

When importing scenes from glTF or glb the UV2 unwrap fails for all meshes with the following error message. When using the scene and making everything local and using the 3D->Mesh->Unwrap UV2 for Lightmap/AO there is an additional error popup which asks if the mesh is manifold. Credit for the gltf in the MRP goes to Kay Lousberg. Error 1:

Error 2:

Steps to reproduce

1. Import the MRP on Android
2. There should be an immediate error in the output
3. Go into the main scene
4. Try unwrapping the banner_blue MeshInstance3D

Minimal reproduction project (MRP)

unwraperror_2025-06-11_11-57-43.zip