brick FAQ

Q: Why doesn't brick get my Ctrl-arrow key events?
A: Your terminal emulator probably isn't sending the expected sequences. For example, OS X's Terminal.app does not do this by default and requires configuration to make it work. See also:

http://unix.stackexchange.com/questions/110022/how-do-i-find-out-the-keycodes-for-ctrlup-and-down-arrow-for-term-screen
Q: Why do some emojis mess up the layout?
A: For wide characters to be displayed correctly, vty's determination of the character width and the user's terminal emulator's determination of the character width must match. Unforunately, every terminal emulator calulcates this differently, and none correctly follow the Unicode standard. The issue is further complicated by Unicode combining characters and releases of new versions of the Unicode standard.

As a result, the current recommendation is to avoid use of wide characters due to these issues. If you still must use them, you can read vty's documentation for options that will affect character width calculations.