MArcomage

Here is a replay.
Enemy had Chaos Dwarf, but when I played Bronze Golem his Dwarf stayed in his hand. This is obviously bug.

I checked the code and it looks fine. Because the keyword code is separate from the card code, it's unlikely that banish would malfunction in this specific card only. The more likely scenario is that you discarded his dwarf, but he drew another one. In this particular case the system would not see the difference. I think I will modify the banish keyword to prevent this scenario from happening.