Inventory wipe after Beating the Game

I beat a Minecraft world by killing the dragon, but i needed to grab some things from the overworld before going for end cities. I jumped through the portal end credits came up. As usual i hit the skip button, but then it disconnected me from the world when i logged back on i was at my bed near the end portal with the xp id gotten but my items were completely wiped from my inventory. I jumped back through the portal hoping somehow they’d be there but they weren’t. I dont have any screenshots because you cant really demonstrate something like this with them. Thanks for making the best game on the planet (bedrock edition)