AssetBundles and lightmaps in WebGL

I'm working on a WebGL project utilizing AssetBundles.
I found that when I place some assets that are shared among other scenes into their own asset bundle that baked lightmaps don't function.

For instance, I have a grass mesh that I use for the ground in a couple scenes. I placed that mesh and associated materials/textures into their own assetbundle so I can load it separately as a single package for all scenes. However that ground is almost black in the shadows when I do that.
When I include them in the same asset bundle as the scene, the baked lightmaps are working great. Of course I end up with duplicated assets throughout several bundles which isn't ideal.

What can I do to overcome this issue and not have to duplicate assets into several bundles?

 

I should have added:
- Unity 2020.3.2
- I did set Shader Stripping > Lightmap Modes : Custom > Baked Non-Directional : True