Deaths caused by inescapable situations such as Lava should kill the player immediately.

Death by Lava is nearly impossible and requires constant reset of the cooldown by forcing the bleeding player to revive, to die again the next second.
You can save the player by using Falling Sand to fill blocks and other weird ways, but at that time, the player's armour will be already destroyed.

There may be a config to adjust these, so users can just toggle this feature.