Bug: Waiting for opponent

[Realsniper]

Hi,
I really enjoy playing forge, thank you for creating this.
I found a bug when played against the AI with my own built deck:
1. I attacked with an Atog + cranial plating
2. He blocks with a Razorgrass Screen and casted Hydrosurge on my Atog
3. I then sacrifice an artifact (Great Furnace) so my Atog would get +2/+2
4. But then the AI freezes up and all I see is "waiting for opponent" in the bottom left

I hope I explained it clear enough.

*edit: Version of Forge that I'm using is 1.5.46-r-1