The critical heal thing happened again. Don't dismiss this, because he healed for like 580 on a level 1 heal without being on critical health. I am super sure about this, and it really wasn't fair. I did not misread anything. It's happened 3 times in the last 100 battles, so check it out if you can.
Please use the bug report template next time and include more details, such as your opponent's total health and you opponent's health when they healed.