I was trying a Hunting Ground and several Tramplers and Glinthawks attacked me ruining my run, I didn't want to waste my medicinal herbs so I waited to simply die and restart. But I noticed that my health bar recovered a little bit when Aloy was in danger (when it's blinking), and it never happened to me before.
Was this feature always available? Or is it a collateral effect of some ability I've unlocked?