Basically, if you are at low health (about 1/2 a heart to 2 hearts) and switch to 3rd person then back, your health bar will "fill up", you still have 1/2 to 2 hearts, but it looks like you have all of them, not game breaking, just a visual glitch I found

Visual glitch i found, nothing serious.
UPDATE: Bug was a result of a very bad device with low memory + almost dead hardware. The bug is no longer a problem on the current version and my current device.