Upon opening Minecraft, when the player selects a world from the world list too quickly, the game would show "The world has been set to single player mode". Clicking on OK would return to the World list.
Steps to reproduce:
Launch Minecraft Bedrock Edition
As soon as the title screen loads, click on "Start"
As soon as the world list appears, click on the first world on the world list.{*}{*}
Expected Result:
The world would load normally
Observed result:
A message with "The world has been set to single player mode" and a OK button appears
Notes:
Upon re-selecting the world after clicking on OK, the world would load normally and functions fine.
This bug affect worlds with "Multiplayer Game" option toggle being on and also off.
This bug has been fixed in the latest Beta.