Please note that the mob spawners only revert to aggressive mobs once a passive mob tries to spawn from the spawner. If you had a spawner that never spawned any of the mobs you selected with a spawn egg, there is a chance that it will stay like that until you create the conditions that this passive mob would actually spawn, and then it will revert to aggressive mobs.
Uncovery Minecraft
Thanks Uncovery, I was under the impression I was harboring contraband. Good on you boss.
Thank u for the reset of spawners. But the nether spawners would it be possible to have them reset to blaze spawners agains since thats whats found in nether.
Yeah we have a solution for this now. I hope we can implement that today.