Alternative Summary/Title: "sign GUI does not match final product"

On our Realm, I've tried naming a Sign, however Line Breaks don't get registered. I've Tried that on a different World (not realm) and had no issues... why is that?

This could be somewhat related to MC-99863, but I'm not sure.

(End of required Info)

Notes:

•         More testing should be done Bug Confirmed, no more Testing needed, yet still appreciated
•  Maybe a Temporary Workaround with special characters
•  The cause of the issue (Client side _{(less likely, due to Attachement 1)} or Server side?)

Attachment 1: image-2021-08-29-16-52-05-577.png