local world glitch

when ever i join a realm then leave the realm and join any of my worlds my data on that world is reset. All of my scoreboards everything even my inventory and tags that i had on my-self. but when i leave and rejoin my world its back to normal. and if i where to give myself something when that glitch happens and do the glitch again i would have the stuff (if i gave my-self anything) from the last time i did that glitch. also my location in the game is reset as if i just join the world for the first time. basically when that glitch happens it just acts if i am a new player but also a owner so my inventory dosent save but i still get to be an op.