There are 3 players that have been effected by this bug all 3 were running minecraft on Windows 10. Within my realm (I'm the owner) player 1 entered a distinct chunk and the game froze. player 2 came to help and they too froze, player 2 logged in with their mobile phone and was not frozen and left the area. I went to investigate I too froze. And there seems to be more than 1 chunk effected. This did NOT occur until after the 1.0.9 update. My Realm is over 620MB I can send it to you if you need.

Side note, I was standing just in front of the chunk in question it was raining all the rain was falling as normal in the chunk a creeper came across the same chunk and blew up no problem but as soon as I stepped 1 block forward it froze, all the rain halted and the dropped blocks from the explosion stopped bobbing.