Twice I have played a Dissipation Shield, and twice it has disappeared on my next turn. both times there has ben a horned frog (non-upped) attacking, and the second time, there seemed to be a large amount of damage coming in, from three cards - horned frog (non-upped), cockatrice (non-upped) and chrysaora (non-upped), although I didn't see what it exactly was. The first was against an Aether (AI3) opponent, the second was Water (AI3), Niethyer used steal, deflag, etc. and I had not run out of quanta. Help?
EDIT: I've reset my account, so it may fix it. I was going to anyway.