Gamerule spawnRadius not working

Hello there, im running the new popular mod called RLCraft and I have a server up for it. Long story short I have the random spawning enabled. Not sure why random spawning isnt working because i havent set a spawn, Im running the following plugins:

SpongeDistanceChat, LinkMe, Broadcast, and EagleFactions

i also have the radius set as /gamerule spawnRadius 40000