Custom Base Class Stops at Level 19

Smithicus

Are there restrictions for new custom classes that prevent leveling up beyond level 19?

I have created a new base class: Mechanist; however, the class will only level up to level 19. At the level up threshold for level 20, the level up button appears for the character and I am able to go through the process of adding skills and feats, but the conclusion leaves the character at level 19 with the level up button still flashing.

Smithicus

I found by removing all references to EPIC_Feats from the CLS_FEAT_MECHAN (used by the class), that the class was able to level up to 20. Not sure at the moment why this prevented the progression.