List of steps to reproduce (step by step, including full links if applicable):

• open any page
• open the visual editor mode
• switch to wiki text editing mode
• continue switching between editors

What happens?:
the link is duplicated every time you switch the editor

What should have happened instead?:
only one link should be visible

Software version (if not a Wikimedia wiki), browser information, screenshots, other information, etc:
https://en.wikipedia.org/wiki/Harmsdorf,_Ostholstein