Arrow keys and emoji

In the editor, when you type a sting of emoji characters and you try to navigate thru them with the arrow keys right abouve the keyboard, it doesn’t work.
Edit: Same problem with other symbols like the Pi symbol. Also, when trying to type those characters, it moves the cursor the then of of the box and you have to navigate back. Please fix.

Correction: You can’t go backwards, but you can go forwards.

Just curious, how hard is it to fix?