Equipping an item with an attribute modifier that reduces your base health and taking poison damage causes a death screen to appear. After clicking "respawn" I was able to continue as if my character never died. This caused my character's model to be tilted as if he was in the middle of death animation. This bug doesn't occur with other sources of damage (including wither effect damage) and it seems to happen only if equipping the item caues player's current HP to be reduced by at least 10 points (5 hearts).