Odd LAN behavior and crash

I was playing LAN SMP with my friend. I had to quit the world to do something, however my friends client did not immediately exit the game. His character proceeded to fall through the world until a timeout exception at bedrock. I then restarted the LAN world. Upon trying to join the game, my friend got disconnected due to a Java exception: Received string length of 26 is longer than max string length of 15. I also noticed that I had been removed from my scoreboard team. I then quit the world to write this, but then suffered an "Updating screen events: java.util.NoSuchElementException" crash.

Notice the following lines of the report:
All players: 1 total; [bsv['HB_ian'/14480,l='MpServer',x=222.81, y=116.81, z=228.88]]

bsw['SkyTheKidRS'/14516, l='MpServer', x=236.28, y=71.00, z=214.91],

It says that I am the only one online, but it also lists my friend as an entity. Definitely a glitch.