On peaceful mode, Protection I helmet enchant makes health regenerate faster than you lose it whilst drowning.

I think this might be device specific. On my Samsung Galaxy S6 (SM-G920W8), Android 5.1.1, MCPE 0.13.0, although peaceful mode heart regeneration does replenish hearts quickly, it is not faster than the rate I am losing hearts when underwater, and my player does drown as expected. The additional time before my player dies is not unexpectedly long.

I don't doubt your results however. The bug may occur when the device is under powered, where the world is complex (i.e. redstone, many mobs, etc. slowing down ticks) or a combination of both those factors.

I have tested this on redstone heavy maps and there is no change in regeneration rate. The heart icon blinks and empties but then blinks again and half of heart is missing. Maybe this is what you mean by regeneration? It is not regen, it is just indication that half of heart was removed.

if i can show you a video of what im seeing you would understand but...ok so when i am on my world on peaceful mode i go under water and start to "drown"...i lose a heart and then regain it...and i forgot to mention that i have gold armor on with enchants that came from drops from mobs i killed...
the enchants are:

golden helmet - protection 1

golden chestplate - blast protection 3, unbreaking 3

leather pants - unbreaking 1

golden boots - depth strider, unbreaking 1

i dont know if my armor is doing it or nopt because i havent paid attention to my armor health...plus i've been in fights with mobs..so i cant say about that...

Hey @unknown, it's the combination of peaceful regeneration and drowning heart loss that we're testing. There might be other effects at play based on @unknown's latest comment.

@unknown can you create a new peaceful survival world and try drowning? That would take the armor and other factors out of the equation?

ok i went onto another world and started to drown myself with no armor and on peaceful and started to drown...so my guess is that its the armor doing that...but idk...ill try to take off each peice of armor and try to drown my self and tell you what happens

ok so i took off the golden armor with protection 1 enchatment and i started to drown..

and then i put it back on and kept regaining the hearts back faster then losing them from drowning...i then took off the rest of the armor and left the helmet on only and same result

i tried the rest of the armor but i lost hearts the way i should be...so its the helmet with protection 1 doing it...so try it and see...and if it happens to you please pix...i wanna drown in peace 🙂

Thanks, I will try to test it. It does not happen on PC so if I can repro - it is a bug.

I can reproduce on Samsung Galaxy S6 (SM-G920W8), Android 5.1.1, MCPE 0.13.1. Tested it by drowning on peaceful survival single player mode wearing protection I chain helmet or protection II leather boots. The protection enchantment reduced each drowning damage to 1/2 heart which was less than the peaceful heart regeneration rate.

My conclusion: Protection enchantment on any armor reduces drowning damage to 1/2 heart when maybe it should not.

"Reduces all damage, except damage from the Void, the /kill command, or hunger damage" the full description of protection, so protection also reduces drowning dmg.