I don't know if this is an issue for the clay golem in book 2 as well, but the stone golem in book 3 has an issue with the "vulnerable to cold spells" ability in the spells tab. Specifically, the 5d10 damage is set to be spell damage, which results in the golem being immune to its own vulnerability.
Kinda hilarious; the golem has evolved! Now nothing can stop it! :P