Ohhh that's something I noticed a while ago back in shb, it's likely a bot tbh.

I was doing maps with a few buddies and noticed another group instantly healing me and I thought it was a little odd. Started happening more often whilst doing maps and clearing the trap mobs, and so I decided to test something that proved they were botting.

If you ever want to test and find that proof, simply switch to a gatherer/crafter (class with low hp), switch back to your highest lvl class so that you have like 1% HP left, and you will get an instant benediction (less than a second of response from the bot).