I change my set world spawn in my Survival world for my compass show me my home and after I play in the world my compass show me a random direction.
Steps to Reproduce:
1.Change you world spawn. (Do /setworldspawn)
2.Stroll in you world. (Look you compass for check if is good)
3.Check you compass and follow red arrow. (You will lose you)
4.Good luck for find our world spawn. (Because he gonna change)
Same for the settings:
1.Change it.
2.Wait 1 day. (Or log out I don't really know)
3.Check you setthing. (Is not what you put)