ECMAXML sections using notes are not rendering those appropriately

While validating PR #1218, I've noticed that content that used to be formatted as a note, no longer does.

For example:
https://docs.microsoft.com/en-us/dotnet/api/microsoft.build.tasks.resolveassemblyreference.copylocaldependencieswhenparentreferenceingac

For example, the last paragraph used to render as the following on MSDN:

Not sure if this should be handled by eng team instead. @adkinn @dend to take a look if this is supported and should be working.