I have a bug when loading a scene with 2 objects which have the same name for a material (its name is “material0”). The textures are not ktx2 textures.
Please create a repro in the playground for it so we can have a look quicker
I am pretty sure the texture name is the same in both files which might somehow breaks export ??? @carolhmj worked on it recently so she might be able to take a look once you have a repro setup.