After some forum searching I found what @Pyrohemia said above. I have made an insight iron golem on my skellimancer and am noticing the same thing. The thread this came from did not have a resolution or further discussion on this matter, so I'm posting this to see if anyone else has experienced this "bug". Thoughts?Re: Patriarch GooberIII - Telebombing Zookeeper/Hunter
I recently took my poisonmancer to patriarch and he also used an insight iron golem. I also noticed that the meditation stopped working at some point in act 5, but it was manageable because I was also using a 1.07 MPK ring. (Corpse explosion at level ~43+ takes too much mana for insight alone with my fairly small mana pool and I can't teleport for long with just a MPK ring.)
I just thought it a little odd until you mentioned it here. Seems like there is some sort of consistent bug.