Board Thread:Questions and Answers/@comment-81.36.88.37-20171218232330/@comment-31024592-20171219184457

Well, I'd say it was one of 3 options:

1. Could have been a bug, Ubisoft is known for those.

2. Could have been an ability. I know the First Aid mod "Overdose" can overheal for a short while, and the Recovery Link overheals and recharges fast while it's active.

3. If you're on PC, possibility that it was just a hacker.

My guess is it's just a bug.