Certain blocks don't get replaced by air when cloning

summoning ThrownPotions do not seem to work.

Everytime I join a server, I get disconnected within a few seconds.

You can see the compass / clock by crafting it or by looking in the statistics screen

F5 not working properly (More in-depth than others)

EXP orbs will switch locations after a second or so from killing a mob.

Game sometimes freezes when playing on a server for an extended period of time, quitting, and joining a different one.