Sign in problems and multiplayer issues

I'm getting annoyed with ur service on ps4 Minecraft, even when I just start the game up it's shows that my Microsoft and playstion both connect properly but, I then go I to a world and can't ask friends to join me because I've somehow signed out , I then exit the game and check that I'm still connected which I am, but each time I go into a world and want to play multiplayer I can't, and i ve just recently paid for multiplayer services in playsation plus,  an u plz solve the issue, also I can't join any other player in their world