As simple as the title. When pressing enter to add a line break in realms, the sign will instead force the text to the last active line with a space.

Steps to reproduce:

• Create and place a sign
• Begin typing anything into the sign
• Press "Enter" at least once to add a line break with some space leftover in the active line
• Begin typing into the newly added line

Observed Results:
The text will bounce back and forth rapidly on the sign between what it should be, and what the realm is forcing it to be

Expected Results:
Just like in a normal world or server, the line breaks should, obviously, allow a new line to be typed in without needing to fill the line.

Image showing the issue perfectly: