Action taken:
Copy this text from the German Wikipedia, and paste it into VisualEditor, towards the top of the page:
England gelang zwar sechs Minuten später durch einen von [[Allan Clarke (Fußballspieler)|Allan Clarke]] verwandelten Elfmeter der Ausgleich, mehr ließen die Polen, insbesondere ihr Torhüter [[Jan Tomaszewski]] - der kurz zuvor von [[Brian Clough]] als Clown tituliert wurde - nicht zu.<ref>[http://eu-football.info/_match.php?id=12071 eu-football.info: „Football MATCH: 17. Oktober 1973 England v Poland“]</ref> „It's all over“ wurde dies vom Kommentator des Spiels kommentiert.<ref>[https://www.youtube.com/watch?v=Vi9vZCo215w England 1-1 Poland (1973) WCQ ]</ref>
Expected result: The two sentences and their refs appear on the page.
Actual result: The two sentences and their refs and a new ref block appear on the page. See T127664: Copying and pasting wikitext with refs results in the addition of a <references /> block for this part.
Weird result: Sometimes this ref block contains all the refs on the page, rather than just the two refs above the block that it ought to contain.
<references /> is only supposed to display the refs above it on the page. In this instance, there were two (new) refs above it, and three (#3, #4, #5) below it. But sometimes, this block displayed all five.