The bug
Spawners do not spawn monsters anymore even if the required conditions are met.
How to reproduce
Set the difficulty to something different than "Peaceful" (
/difficulty easy)Set the time to night
/time set nightUse the following command
/setblock ~ ~ ~ mob_spawner 0 replace {SpawnData:{id:"Zombie"}}
Note: This worked for 1.9-pre1
Related issues
duplicates
Comments
migrated
migrated
I can replicate this - rolled a backup of my singleplayer world back to pre 1 and zombies started spawning immediately.
migrated
Your bug issue 97491 broke the spawners.
marcono1234
Most likely related to MC-97491