I was Enfeebled in an Epic Wizzy King and like we killed some trash and you know how when you kill mobs it throws random renown at you?
For some reason on my screen appeared this message saying I couldn't receive the Heroic Deeds (got numerous 50s like that throughout quest) and I wasn't anywhere near a chest and wasn't picking anything up.
So... I think they have renown pop into your inventory and then disappear when they give it to you from trash, or something.
I couldn't take anymore being Enfeebled ect. so it didn't give it to me for that time. If this is how it works then please change it.