Kazakus bugged?

I am playing a deck with Kazakus, of course with no 4 mana cards in the deck. Usually it works well ... but ...a few games ago I played Kazakus and no golem was created ... I was puzzled ... maybe a 4 mana card was created in my deck by accident ...

Today this happened again; I double checked ... no 4 mana card was in the deck, nor created ... any idea? Tks

If you're playing libram pally with kazakus, it'll brick if your libram discounts get any of the librams to 4 mana in your deck.

So for example if you play 1x Aldor Attendant, which causes your Libram of Justice to go to 4 mana, which will brick your kazakus until you play another libram discount card or draw them.

Otherwise I can't say, since its working fine for me.

yes ... this is the reason ! I removed Kazakus from my deck :) tks