No invite to game button bug or glitch.

There is no invite to game button in my multiplayer worlds and this is a huge bug because I can't play with my friends,many other mcpe players also have this bug I have searched many times for this bug but I found only 1 youtuber to make a vedio about this the veiwers also had this bug,the invite to game button only appeares when I am on my friends servers,realm servers,mini game servers,I set my worlds multiplayer settings to friends of friends,invite only,friends only but still there's no invite to game button.I play Minecraft pe on Samsung Galaxy j2 6.