Just to be sure, do you mean Cleanse here? Calm is the Sleep/Panic/Charm remover. But, if you did mean Cleanse, yeah, this sounds a little off. I'll take a look.
That said, if your HP are really low, it is expected you might get AIs attempting to heal you through Infection, on the grounds that you may not survive if they choose to heal the Infection first and you get hit again, but that doesn't sound like it was the case here.