In TwoColConflict go to the editmode of some selected paragraph, and without changing anything click the Cancle/Reset-Icon.
You will be promted with the Text "Änderungen verwerfen? Dein Text wird auf den Zeitpunkt zurückgesetzt, an dem der Bearbeitungskonflikt aufgetreten ist."
Since you did not change anything, the text is confusing and unnecessary. Analogously to the normal editor you should only get a warning if you did change anything.