When editing the user page of a blocked user, some messages appear at the top of the page, for example blocked-notice-logextract.
They don't appear when editing with the VisualEditor.
Compare:
Good: https://en.wikipedia.org/w/index.php?title=User:SEAROSE8&action=edit
Bad: https://en.wikipedia.org/wiki/User:SEAROSE8?veaction=edit
Version: unspecified
Severity: normal
See Also:
https://bugzilla.wikimedia.org/show_bug.cgi?id=52004