NodeNorm ES won't return NCBITaxon:2 alongside "MESH:C029371",

[gaurav]

This query to the POST interface returns null for "NCBITaxon:2":

{
  "curies": ["MESH:C029371", "NCBITaxon:2"],
  "conflate": true,
  "description": false,
  "drug_chemical_conflate": false
}

But replacing that MESH identifier with another identifier returns "NCBITaxon:2" correctly:

{
  "curies": ["MESH:D008795", "NCBITaxon:2"],
  "conflate": true,
  "description": false,
  "drug_chemical_conflate": false
}

Reported by @uhbrar