Issue Details

• Minecraft 1.12.2
• Minecraft Forge 14.23.2.2618
• Mob Grinding Utils 0.3.4 (Yet to try the newer build - though from the changelog not gathered that anything to do with these blocks has changed)

Issue Description

The boss bar on a dedicated server doesn't get hidden either by the person that right-clicked the wither boss muffler nor any other players

Issue Media

Tested on a clean install with just MGU and JEI and the block works fine on a dedicated server . I can't replicate this problem, it may be a weird mod interaction with another mod. Closing because I just can't duplicate the bug.