5* Weapon - Universal Critical 2 - How is it working? Potentially bugged

From the ‘manual’:

Universal Crit 2 - When Attacking, increase Attack by 200% of this character’s Crit stat

How is this working?
How should this work? I have collected some data and I think this is not working (as I think it should do).

Assuming 3000 Attack. And 40 critical, what should happen?

This one I believe they’re looking into but the way it currently is working is:

Assuming 40 critical from a weapon and base 10 crit Chance from the toon = 50 x 2 = 100 extra damage. Extremely low basically