Open 1.4.1: the mobs spwaned by muchine disappear!!

[jreference]

Version:
1.4.1

What is the bug:
I used 1.5.1 version of infinity mod pack.

I realize a bug at Auto-spwaner(MFR) and powered spwaner(EnderIO).

Actually, they spwan while power on, but the mob spwaned by them disappear imidiatly before grinder working.

Mod & Version:


Paste.feed-the-beast.com log:


Can it be repeated:


Known Fix:

 

[Kurama]

Server or singleplayer?

 

[iTpyn]

Just tested it - works fine in SP
Are u on Peaceful difficulty? Spawning and immediate despawning - it definitely looks like a Peaceful difficulty.

 

[jreference]

I'm sorry
since I tried some experience other creative world, I turned peaceful difficulty.
I didn't check this......