"Abandoned connection closed" error message when trying to join worlds

Steps to Reproduce:

• Join (my or someone's) a world. 
• Observe

Observed Results:

• Most of the times you get the "abandoned connection closed" Error message. 

• In (my) the World the message "player left the game" appears. The joining message does not appear.
• (This is what one person had)

Expected Results:

• The person/s should have joined me.

Notes:

• I once tried to join a (one of the peoples) world and I got the same error message etc.
• I tried to search for broken files, I re-downloaded the game, I restarted the game and I deleted the marketplace cache and nothing of this worked. The other person also restarted the game with no effect.

• The person plays on Xbox. Another person (where we have the same problem) plays on laptop (Bedrock) and has a different error message and no leaving the game message appears in my world. He also tried multiple things wich also didn't work.

• The laptop guy could join me sometimes but that's some months ago and it doesn't happen anymore. 

• I do not know if only I, as a switch player, have this problem.

• I/we had the problem since quit some time now.
• It also appears to happen to mayby 50% of players that want to join me (not confirmed, just estimated)