Thanks for playing - I'm so glad you liked it. I have a laundry list of features I want to add - definitely squashing any bugs at the top of that list. If you remember what any of them were specifically, I would love to hear.
I'm not sure what triggered the bug, but there were a couple times the number dice weren't matching up with the layout of the UI (always happened at the start of a new round/enemy). I had a couple times where a number dice started in one of the attack slots, and one time where I thought I was missing a number dice entirely only to find out later that two of them were layered on top of each other.