Hello so i found something on my minecraft server and also tested it in my world. If u make a nether portal then hold your shield while entering the nether once u r in the dimension until u dont right click your shield makes u invincible u can attack mobs while they cant attack u.

Sorry i am not used to record but u can test it. It Even works with older versions soo fix it before the next one.

Hopefully this gets fixed as bugs could ruin the game.

Bye,

Hardik Bohra