Color management issues for .obj + .mtl

A-Frame Version: 1.4.2
Platform / Device: chrome for windows different versions, oculus quest2 browser

I'm trying to export scene from Blender to my AFrame based web page for VR. For some reasons i prefer to use obj+mtl format. I found a few issues regarding loading model to AFrame:

1. All the materials during load assumed to have sRGB colors and converted to linear color space using convertSRGBToLinear(). BUT blender export the exact colors i wish to see in scene and i can not find a way to disable this mandatory color "correction" which ruine the model. Take a look at MTLLoader.js line 387 method createMaterial_( materialName )
2. For models which use material more than once all material colors become black or about black. I'm not sure about reason but a think that's because that correction apply multiple times to same material.
3. The diffuse map textures become dark (also color space "correction") until i set renderer="colorManagement: true"

Please can you help me to overcome this obj+mtl loading issues or add an option to disable unnecessary color "corrections" for <a-obj-model>?

Start with MTLLoader.js at line 387, in createMaterial_(materialName), and review how loads materials. Reproduce the reported behavior with a Blender-exported OBJ+MTL model, including reused materials and diffuse maps, in the listed Chrome or Oculus Quest 2 environments. Done means the model colors and textures load correctly without unwanted repeated color correction, or the requested opt-out is clearly supported.