[Resolved] GM Thrust Blade Skill can stack up to 3 levels only

I don't know why but recently, I can only stack my GM Thrust attack to 3 levels at most.
It should be able to stack up to 4 levels according to my past experience and all the other GM skills in the same blade tree all can stack up to 4 levels.

Also for the Shield of Ice (Level 79), sometimes, it can stack up to 3 levels and sometimes it can stack up to 4 levels. The maximum level that can be stack is not fixed at all. It is switching between 3 and 4 for the Shield of Ice.

 

Do you have any thrusts in your deck? If you have any in there then you won't be able to stack the locked one up to the max level. Otherwise I've got nothing. I'll test when I get home and see if I notice the same thing

 

I found out why it cannot stack more. I just removed a lot of unused glyph in the top right hand area of the building deck window. A lot of duplicate and unused glyph which have grey text. Now, I can stack up to 5 levels for every blade skills. Thanks for the information!!