my stuff are all gone

so i was getting on minecraft and it would sometimes always kick me out of my account and i would have to sign back in so i can play with my friend, but this time when i was signing back in my account, my wifi went down at the same time i sign in my account. When i click on the play button and looked at all my world and saw only purple screen on them, i than click on a world where i would always play, but when i got inside the game, i was at spawn with steve skin and a starting map. All my stuff was gone, all the stuff that it took me age to get, like netherite tools and armor, even elytra. i had lots of shulker on me and had lots of good stuff inside them. but not they are all gone because of a bug.