STEPS TO REPRODUCE: 1. Add a <div> with contenteditable. 2. Add the following markup: <a href="#"><mark>link</mark></a>a. 3. In the browser window, type something between "link" and "a". EXPECTED BEHAVIOR: The nesting order for the tags is kept, and the new character is added outside of them. CURRENT BEHAVIOR: The caracter is added to the mark tag and nesting gets inverted, resulting in this: <mark><a href="#">link</a>a</mark>a Reproduction: https://codepen.io/vborrasc/pen/XWMrRpe
<rdar://problem/78017071>