Siecore template field type resolution and solr when performing search query with sort - solr

Question

I'm trying to perform a search sort using Sitecore 9.3 and SXA. The default search configuration allows the user to sort by 'Title'. The search logs shows queries with &sort=title_t desc which is expected.
If I change the sort criteria from Title to Other Title via /sitecore/content/[site name]/Global/Settings/Facets/Title to a field other than title, I no longer get results from the search results call.
Looking in the search log shows that Other Title is not being resolved to other_title_t with the error ERROR Solr Error : [sort param field can't be found: other_title ]
The Sitecore documentation https://doc.sitecore.com/developers/93/platform-administration-and-architecture/en/using-solr-field-name-resolution.html described the mechanism for resolving fields to the correct type using index config
<fieldType
fieldTypeName="html|rich text|single-line text|multi-line text|text|memo|image|reference"
returnType="text"
/>
...
</fieldTypes>
which is then used with the the type match to append _t to the field name
<typeMatches hint="raw:AddTypeMatch">
<typeMatch
typeName="text"
type="System.String"
fieldNameFormat="{0}_t"
cultureFormat="_{1}"
settingType="Sitecore.ContentSearch.SolrProvider.SolrSearchFieldConfiguration,
Sitecore.ContentSearch.SolrProvider"
/>
</typeMatches>
This does not appear to be working for sort.
I've found that adding the fieldName (rather then rely on the preconfigured type mapping ) works and result in other_title_t being used as the query sort.
<fieldMap type="Sitecore.ContentSearch.SolrProvider.SolrFieldMap, Sitecore.ContentSearch.SolrProvider">
<fieldNames hint="raw:AddFieldByFieldName">
<field fieldName="other title" returnType="string" />
</fieldNames>
</fieldMap>
Should sort field resolution work via type field mapping already? Is this a bug?