Jett's Core Aura is glitchy

Just adding my experience here. I too was a dumbass and forgot to lock my core aura last month (bye 21 w atk.). It deranked to blue with 3 w atk. I could not open up core aura UI from skill window so I bought one 300 k cube and sure enough when used it opened the UI. Used the cube and went from blue to green. Gee thats nice. Bought another went to red. Bought a third went to yellow with 19 atk. One more and got 34/35 wa and 5 dex. Locked it. So 2700 k nx for 34 wa. Ill take it. I will also be purchasing 365 day lock (max) to make sure I do not lose it.