Nested schemas do not show description in swagger-ui

• OS: macOS 10.14
• Browser: Safari
• Version: 12.0
• Method of installation: Github download
• Swagger-UI version: 3.20.5
• Swagger/OpenAPI version: Swagger 2.0

The following snippet of Swagger JSON from my API includes a description for a nested property:

"reasonForDeletion":{"description":"The reason for deletion. VocabularyDomain=SubjectMgmtAllergyDeletionReason.","$ref":"#/definitions/CodedConceptReference"}}

The Swagger-ui output, however, does not display the nested entity description i.e.: it looks like this:

Steps to reproduce the behavior:

1. Use Swagger-UI to explore an API with a nested property having a description
2. Expand the nested property
3. Observe a lack of the 'description' text

Expected behaviour:
Descriptions of nested properties should appear immediately adjacent to the described property; the nested entity descriptions should then follow

Additional context or thoughts

• this problem has existed in every version of Swagger-UI going back well over a year. It has been reported several times, and described as 'fixed' several times as well

Start by reproducing the issue in Swagger UI 3.20.5 with the supplied Swagger 2.0 JSON and inspect the nested-property rendering path. Done means the description for reasonForDeletion appears adjacent to that property when it is expanded, including a regression check for the reported case.