Update your nick to 576 character. And it will break the layout.
Summary
When update your nick to 576 character it will break the layout.
Steps to reproduce
Go to your setting and but your character(a-ö) to nick field and hit the update.
What is the current bug behavior?
It't make layout too large and it will break it.
What is the expected correct behavior?
It should say invalid nick on this many characters.