What gameplay feature is this bug affecting?
Replying to a user

What's the issue? Please include any error messages you receive and as much detail as possible.
I don't know if this is just because of the message being long or if its actually bugging out.

Any links relating to this bug? For example, if a particular lion is bugging, what is the link to that lion?
Cannot provide.

Any screenshots you can provide us with?
Here is the screen shots > https://imgur.com/a/aGI660O

Please provide us with step by step explanation how this bug happened so we can attempt to replicate it. If it's complex, please include screenshots where possible:
I was requesting a link for a commission of my heir, When I went to open the message the user had sent me it was normal but when I went to reply thats when the text box extended instead of staying inside the borders of the screen.