So I was playing on a realm I had played on regularly, and I happen to have a riptide 3 trident. It had just started raining so I decided to Riptide up into the air as high as I could, and fall back down to the ground as fast as I could. I meant to hit the nearby water, but hit the ground and died instead. When I respawned and headed back, the only items that were there were my Netherite armor and a shield. (Nothing else had curse of vanishing.) I had dug a 5x5 hole near where I died to look for my tools/food/other stuff and it was gone. Im still really bummed about it. You could try to replicate it by getting a riptide 3 trident, set the weather to rain, go up as high as you can, and when you hit about y:100 active riptide again and hit the ground and die, and all you should get back is armor.