Minecraft Username: chargers2417 Brief Description: Colored signs have discoloration when facing either North or South. Instructions: Place any colored sign that faces North or South and the color will be darker. Signs facing East and West work just fine. How many times did you recreate this bug?: Many times Result: Sign on the right Expected Result: Sign on left Evidence:
Confirmed it in Spigot 1.9 and Vanilla 1.9 a few weeks ago. It appears to be a vanilla one - especially because I remember this bug in a 1.8 vanilla world from 2015.