I recently went idle for about twenty minutes at a blaze farm I had constructed in the nether on a friend's realm. Upon returning, I flipped a switch that activates a piston to contain the blazes, and the game crashed. Since then, I have been unable to rejoin the realm. I get the normal loading messages when attempting to join the realm, up until it reads, "Building terrain". At this point, I get an error message stating, "Disconnected from server".

Our initial belief was that the number of mobs present in the area overloaded the game and caused the crash. As such, the owner of the realm traveled towards my nether fortress with the intention of clearing out the blaze farm, however, once he got to within roughly 25 blocks of the area, his game also crashed. Since then, he is only able to move about 20 blocks in any direction upon loading the realm before his game crashes again. He also attempted to use the /kill @e command to clear out the blazes, but this has not fixed the problem.

Attached is a video showing the realm loading sequence, as well as a screenshot showing that I have updated to the latest version.

This problem occurs on both my Xbox One as well as my iPhone 7. I have uninstalled and reinstalled the game on my Xbox, but this did not fix the problem.