This mod prevents mobs from spawning from the EnderIO Powered Spawner

[Trnrr]

Version: NoMobSpawningOnTrees-1.2.2-mc1.12.2.jar

Using the default config

Configuration file

general {
# For details, please check https://github.com/oldjunyi/NoMobSpawningOnTrees/wiki
S:blacklistRules <
woodlogs # This line disables mob spawning on all types of wood logs.
block:minecraft:brown_mushroom_block || block:minecraft:red_mushroom_block
# The above line disables mob spawning on mushroom blocks.
>

# Extra spawning tries per tick. This will only applies to hostile mobs.
D:extraSpawningTries=0.0

# The capacity is the maximum (approximate) number of creatures can exist near the player.
# Set -1 to use the default value, which is: monster(70), animal(10), ambient(15), water(5)
I:spawnCapacityAmbient=-1
I:spawnCapacityAnimal=-1
I:spawnCapacityMonster=-1
I:spawnCapacityWater=-1

}

Powered Spawners do not work when this mod is installed. It says "Some mod is blocking spawns". Once remove this mod, they work.

Not a huge issue just wanted to document in case anyone else was having this issue.