Mobs should despawn/die after players die In trial chambers

Me and my friends have a huge issue where if/when we die in a trial chamber, it is impossible to get our stuff back. 1. Mobs pick it up and then become unkillable with it. 2. You don't have anything and get swarmed way to easily. I suggest when a player dies all mobs associated with that player should die, dropping all loot they've picked up. So if you're in a group of people, if one of you dies, some mobs should despawn. This would make trials chambers more fun as you wouldn't get trapped in them.