Try to edit the table of all versions in https://de.wikipedia.org/wiki/Versionsgeschichte_von_Mozilla_Firefox in VE.
E.g. double click on the cell with "Erste Version: Anpassbare Symbolleiste, Schnellsuche für Lesezeichen und Chronik, gleichzeitige Darstellung mehrerer Dokumente in einem Anwendungsfenster (Tabbed Browsing)."

Expected: You can edit the table normally.
Actual: Several cells move around.

This is something that happens when the table code is broken, but the code seems complicated, but correct for me.