Multiworld creeper explosions???

I have 3 worlds: Normal creative world without mobs, nether world and normal world with mobs.

And i just found serious bug. I was in creative world and friend was in normal world. Then friend said that creeper is following him and creeper just exploded. But suddenly there was big hole in front of me. Luckily, hole was quickly restored by WorldGuard. But still:

How can creeper explosion make a hole in another world? Or may that be WorldGuard issue?

I'm using CraftBukkit 283.

 

The multiwold functions by replacing chunks around you with the appropiate world's chunks. It sounds like to me it may be a WorldGuard issue with chunk updates getting transferred between worlds. Or you have multi-dimensional creepers, in which case may god have mercy on your soul.