After 10 secs of loading the world it gives an error message and closes out of the world and goes to main menu, The message says the following:

''You are out of data storage space and Minecraft is unable to save your progress! Minecraft will return you to the Main Menu to clear up storage space''

I think this happens in Windows 10 when people online are in other parts of the world loading chunks.

I have over 504GB left on my PC so it has to be a bug, that world is less than 300MB

Minecraft version is Windows 10 (Bedrock) 1.4.2