When ever I join my brothers lan world on Xbox 1 I will lose my stuff and respawn as if I had just started playing the world. Also sometimes when I join the same world it will give me my stuff back from the first save of me playing.

• When I join the world after already playing on it I louse all my stuff
• i log off and log back on and I start from spawn with nothing

i log back of then get back on and I have my stuff back from the first time from playing. 

now when ever I log back onto this world it will spawn me in as one of the two saves I have. And it is random on witch  one will load in.