are you sure you had full HP? is it possible you had damage and you just matched a spin to get +5 electrum?
I'm quite sure about the max hp. I had 41 coins before starting the spins.
also if you are using a darkness deck, I should ask did you depend on vampire healing to get the EM because in the latest patch, vampire healing occurs after the damage is done and the game is decided so if the vampire is going to deal final damage and final healing the healing wont happen
I had a rainbow deck and the tabletop was something like this before pressing the final done, as I can recall:
I had bunch of quantum pillars, a protected dissipation field, some mutants without vampiric skills and a purple nymph to make them frogs and chickens heal me.
The AI had some pests, scorpions, cockatrices and frogs. (I did not AM the scorpion to avoid the venom effect )
I was not affected by poison - the DF was played before the scorpion. The only cause I can think of now is momentum, but the AI with the darkness-life deck doesn't have quanta or the card itself to play it as I know.