https://en.wikipedia.org/w/index.php?title=User_talk:108.4.140.134&diff=670367514&oldid=669998442
Timeline
Level 2 warning - 3 July
Level 4 warning - 5 July
Level 3 warning by HG3.1.3 - 7 July
It should not have added a warning, but reported to AVI/AIV.
Perhaps the level 4 warning uw-nor4 isn't added to the config file for en.wp, so Huggle only saw the level 2 warning?