I was running a raid when I got killed. When I died I spawned next to my gear because I set my spawn point there so it rules out any possibility of despawning being the issue. I quickly set to peaceful and ran to my gear just to realize that my armour and elytra where gone and so was my sword which I was holding in my hand. None of it had curse of vanishing but it disapeared like it would if it did. I have died a lot without this glitch happening but I'm going to try and recreate this glitch and screen record it