I have version 2.0.103.346 installed and as of 1/10/16 I still have the bug you described where the lead character moves at normal rate and the other 3 characters run almost in place and move very slowly. There is also a very long lag during combat. I have to think this is a deeper issue since my problem started at around level 15 when i entered the phantom forest from luculla and teleported to the end of time and then teleported back to any zone but the phantom forest. Looking at the threads the common theme is that each person teleported to the end of time and then back to a world zone. I too have over 100's on this game and im kinda bummed that my adventure ends because of this bug because it's near unplayable now. Please help.
