No they didnt.
1 was wining 4-6hp everyturn.
The other won hp when i was going to kill him.
Add Ekapop to the list.
Was going to kill him and miracly he won like 10+ hp. I was doing s***loads of dmg to him, he was probably already pumping hp some turns ago i didnt noticed just on the last turn.
You know they use something special when they dont play any cards or dont get a +X on the hp bar from efects.
I normaly dont see then wining hp, but when the hp bar is all yellow and sudenly green apears, and they did nothing you know something is wrong.