New Provided Java-8 JVM.
Windows 7 64-bit
When reloading the world, UUIDs on the scoreboard get cut off on reloading the world, making them useless.
How to reproduce:
summon ArmorStand x y z
scoreboard objectives add test dummy
scoreboard players set 1-2-3-4-5 test 200
scoreboard objective setdisplay sidebar test
You can see the entity 1-2-3-4-5 is no longer linked with the scoreboard. The scoreboard now looks for a player with name:
Which can never be an entity.