I fell from a high place, died and spawned in an near by area and all of my netherite items had already been deleted. There was no 5 minute de-spawn time, it just disappeared like it never existed in the first place. A day later I got back on to re make all the items lost. I get disconnected from the sever and when I get back on, all my items in my ender chest have disappeared, all items in my inventory, and all of my experience has been deleted. It was almost as if I had died again (which I didn't) and all of my progress in the world had deleted. Everything that I had in my ender chess were my valuables and they all have been deleted. Also, the world has been lagging a ton. It wasn't just this world that I was playing, but every world that I have been playing in the last month or so.