Help! All monsters gone home!

The monsters do not spawned in the world after i used sponge,and they also do not respawned.But it will be right when i reomve sponge from the mods folder…by the way, there was no any error message in console logs…help help help?

forge version :1.8-forge1.8-
sponge version : Sponge DEV 900+
other mods:none

This is a known issue
It will be fixed shortly (I hope)

opppps …I hope so break my heart…

I think it’s now fixed btw.