The three following things keep happening to me and haven't seen anyone post about this at all and this only and ALWAYS happens when I play with my friends worlds 
1.  When I join my friends worlds they see me move but I don't see them move that is reason why I called this the desync bug and this has been happening on PS4 since the release bedrock Edition on PS4. Also I don't see myself take damage or die when should (my friends do see when I die in there world tho).
2. When I go and mine blocks nothing show up in my inventory and it only does when I leave and join back the world. When I place block sounds for placing them are cut
3. The final nail in the coffin for me is that chucks load in to a certain point (mainly just a little pasted spawn) and then just stop loading and this happens whenever my 5 friends host a world. None of three things happen whenever I host a world either 
 I've have tried deleting and hard resetting my PS4 and account multiple time to still continue to have theses issues. PLEASE FIX THIS OR GET BACK TO ME ON THIS GAME BREAKING ISSUE.