Quadal Combo bug

Comboing the "Quadal" skill into the "Magic:Finale" skill doesnt properly halve the MP cost of "Magic:Finale" and inerrupts the combo stating: "You dont have enough MP".
If the special effect "Tenacity" is used on the "Magic:Finale" skill, the chatlog reports hp used to cast the skill but no actual hp are drained.
The crit guarantee is also not applied if "Magic:Finale" is casted after "Quadal" using the combo-system.
The effects of "Qadal" are saved for the next skill used (MP cost reduction + crit guarantee).

The effects of "Quadal" might be applied to slowly to affect the skill casted after.
This problem might not be limited to "Magic:Finale"