'Quit Game' never closes, just freezes (Correction - was "Save and Quit")

When trying to ''Quit Game", the screen freezes, and it is necessary to use Task Manager and kill the session. Upon doing so, the Java engine throws a non-specific error, and the return to the launcher shows that an error occured. This happens using either OpenJava RT, or the standard Java RT, 64-bit. This is on a vanilla version of 1.17, on a new world or a pre 1.17 world.