Metamorph in WoG. Auto-translated

Today, I accidentally learned about the Metamorph. I immediately checked it out – it seems like an interesting unit, but there’s a problem. To test it, I created a random map and placed 40 friendly Metamorphs in front of a castle. First, after the third battle (with fast combat enabled), I found that instead of the Metamorph, I had Diamond Golems. Then, I started the same map again, and after the very first battle, I had Ifrits instead of the Metamorph (in the tactical mode setup, it changes). Is this a bug, or is it supposed to be like this?