I was out of office for a week, so I'm not sure this happened in the deploy this week or one last week, but 2017 wikitext editor no longer highlights the error when you click a lint error edit link in Firefox 57.0.4 on either Windows 7 or 10. More precisely, it does seem to highlight but then disappears.
Steps to reproduce:
- Enable NWE in preferences
- Go to e.g. https://en.wikipedia.org/wiki/Special:LintErrors/wikilink-in-extlink?namespace=0 and follow one of the "edit" links in the table
When the editor loads, it should select some text on the page, and scroll it into view.