Single player survival, cheats enabled, naturalRegeneration false

Set on fire by lava in the nether, immediately ran to nether portal. Died due to fire damage during portal transition.

At this stage, attempting to respawn gave no response, but was able to quit to main menu. Upon relogging was back in Nether at 3.5 hearts, not on fire with full inventory (as if I had not died). Travelled back through nether portal to find various items (armour, tools) had travelled through, leaving me with two sets.

What I expected to happen was...:

Death, respawn, recollect items.

What actually happened was...:
Death, unable to respawn, relog, respawn with items and discover additional items.

Successfully duplicated.

Steps to Reproduce:
1. Catch fire in nether
2. Step into nether portal at low health whilst on fire, die during transition
3. Relog, respawn in nether and travel back whilst not on fire