I don’t have an answer to your main query, but I am working with a dataset with similar bvals and I noted that doing a single shell multi tissue CSD pipeline provided much better outputs.
You will have to use a specific MRtrix build MRtrix/3Tissue for this → Single-Shell 3-Tissue CSD (SS3T-CSD) | MRtrix3Tissue
You can find a similar discussion about it here → Single-Shell (+B0) 3-Tissue CSD