Players dropping weapons when attacking

Hey guys,

Let me start by thanking you for any help your able to give, I'm having trouble tracking this issue down. I am sure it's some permissions issue somewhere.

Backstory:
On my server we are implementing a kind of jobs aspect by using GroupManager and Heroes plugins. Permission groups (like build.craft.ITEMID) are granted to the player through Heroes as they level up in their "profession". By in-large, this is working perfectly.

The Issue:
Interestingly enough, the players have Interact, Drop and Use perms for all tools and can use with n issue. Oddly, when attacking any mob (peaceful or hostile) the player attacks as normal - including damage etc. - but proceeds to drop the tool. This is the case in survival and creative, in all permission groups, op or non-op. I can't figure out what I'm missing.

I am wondering if there is some permission node I haven't granted, or if it's a bigger issue than that. I have searched several times (but with keywords like mob, player, damage, tool, etc. as expected the result are varied and largely irrelevant)

So, anyone have any ideas?

 

*bump

 

A plugin list would be useful

 

King Pyro, okay here it is:

Appleseed
CoreProtect
Dynmap
Essentials
GroupManager
Heroes
MineralManager
PwnPlantGrowth
TerrainControl
Towny
WorldBorder
WorldEdit

That's all. I never had this issue before installing Heroes and using GroupManager to handle the leveling, that is why only those plugins were listed above. Sorry for any confusion.

 

*Bump