There is a bad interaction between Two-Column-Edit-Conflict-Merge and the new character toolbar the German community created as a replacement for the removed core toolbar feature which also broke the old character toolbar just a few weeks ago. The new code obviously attaches to all elements that match a certain CSS selector.
- The special tool bar does not appear on hidden text fields, but only where suitable
- Come up with a proposal how to solve the issue
- Contact the maintainer to discuss the proposal