This came up while I was testing 275724. Create a page with the following contents:
Test{{#tag:ref|This is a note.<ref>This is a nested ref.</ref>|group=note}} <ref>Another references</ref>
Enable lazy loading references and click on a reference. Once both notes and references sections load, click on [1] in the notes section. I was expecting to see the reference drawer, but was merely shown the highlighted reference down the page. :(