Steps:

1. Go to Content/ Content structure
2. Click Create and select Article
3. In Intro field insert image and click Link button from toolbox to open Link menu
4. Select any content
5. Switch new tab/same tab switcher

Actual result:

(X) is bigger while switching. See: http://g.recordit.co/xmYLLYcQju.gif

Expected result:

(X) button does not change.