Minecrafte PE multiplayer - Time-out when joining world

My son and his 2 friends are trying to play Minecraft together by joining the same world. My son is hosting on his android-device, and have sent a invitation to each of his friends.

We have tried the following:

Case 1: "Friend 1" gets the invite, and joins the game. "Friend 2" gets the invite, at tries to join the game, but gets a time-out.

Case 2: "Friend 2" gets the invite, and joins the game. "Friend 1" gets the invite, at tries to join the game, but gets a time-out.

Case 3: "Friend 1" creates a game, and "Friend 2" joins and can play. My son tries to join but gets a time-out.

The maximum player-limit is 10, and they are 3 players in total.

What can be the problem, when both of his friends can join individually to my sons game, but when they try to join the same game one of them gets a time-out?

Nat type is either strict or moderate, I tried fixing it and went through the web for solutions but none helped to fix it. The thing is I can play all the other multiplayer games with no problem but only minecraft is giving me problem and that too I can
join his world and play but he can't join my world. My Xbox live is logged in and it's working and that is how I can join his world. I don't understand what's the problem with this now. The same problem persists with minecraft pe that I just bought, I can
join my friends but they can't join my game. Note we are not connecting through lan but through multiplayer option, as per the new update which enable us to join our friend's world if they're friends with us in Xbox live. Please get back to me soon, I took
so long to reply as I was trying to fix the NAT type.

I play Minecraft with my friend over mobile. It was working the whole time, until now.

The issue is, when I am in my world, my friend tries to join but it says “Unable to connect to world”.

We both use the same version of Minecraft [1.14.60 as of 6/16/20]. I also have multiplayer set on the world too.

I tried inviting him, but the issue persisted. I tried joining his world, but it showed me the message.

My Xbox account is allowed to play multiplayer and no parental controls are set.

What do I do? Please reply as soon as possible.

Thanks.

The mc servers may have been down, or all the multiplayer servers that host your world are all on the newer versions

I was wondering if there's a way to get a copy of the Minecraft time log to see how long was spent on a world

I am not able to join multiplayer server and my frends server

i dont think you can join realms in minecraft pe edition