Wood Signs

Put the summary of the bug you're having here 

What I expected to happen was...: the sign to display words.
Describe what you thought should happen here

What actually happened was...: The sign would automatically Erase the words.
Describe what happened here

Steps to Reproduce:
1. Put a step by step guide on how to trigger the bug here
2. ... type words on sign
3. ... wait a couple of seconds, the words will disappear.