I just play on peaceful mode for casual playing.
Sometimes when i need strings or bones i switch to Normal.
Today i was on desert and i was searching for Desert Temples then something hurt me and gave me Hunger effect.
I think it was Husk but invisible.
I tried to kill it but I just can't!
I typed /effect give @e glowing and only some creepers were affected but something still hurts me and gives me Hunger.
I Switched to peaceful again and again to normal but they are still like that!
i restarted the game and still like that!