Class experience message on class change

What this problem is related to? (e.g. Website / Launcher / Game / etc. ):
Ingame system message announcing gain of class experience.

NPC Name, Quest Name, Skill/Item Name (if relevant):
Cattleya NPCs.

Describe the problem:

  1. If you are lets say lv5 knight and you switch to lv10 assassin, that 5 levels of difference will be shown as “You have gained x class exp.”

List the steps to reproduce the problem (if relevant):

  1. Change to a lower level class.
  2. Now change to higher level class.
  3. The difference in class exp between the two will now be displayed by system.

Screenshots/Videos (if available):