Problem with "Edit in full screen" for Blog Posts

Steps to follow to reproduce:

• Go to a blog post and click on the pen to edit the post
• Click on the 4 arrows button to edit in full screen
• Click on "Exit Full Screen"
• Click on the arrow button again to edit in full screen
• Look at the "Exit Full Screen" button.

Results:

• Notice after you click "Exit Full Screen" the arrow button looks selected.
• After you click the arrow button the second time and you look at the "Exit Full Screen" button you notice it's white. This behavior should be triggered by hover.
  (See attached images)