So the story is...
I was hunting on a boat in a lake. There was a flat ground on one side of the lake and a cliff on another. Cliff was standing right in the deep water, but I tried to get out several times from the boat right near it. It didn't allow me to do that (You need to turn on Swimming).
But then it dropped me out from the boat, I shot with my bow and then I noticed that my stamina was draining like if I was swimming.
I returned back in my boat and everything was ok, I was hunting some more minutes.
But then suddenly my SHP and HHP started to drain by 15 every second and I died right in the boat.
My energy was almost full, so that's not the case.
Any ideas?
this occurred at about 16.20 utc