Skarner inaccurate tooltip / AP ratio bugged

Hello to the Riot employee reading this,

I just finished a game with a 3 star Skarner on my board, with Deathcap and Rageblade, where his shield value was (inaccurately) displayed as 1.6k health in his tooltip. In actuality, this shield was the standard 750 amount.

I'm not sure if the tooltip is incorrect and Skarner is not supposed to have any AP scaling on his shield, or rather that the in-game interaction is bugged.

Either way, please check it out. I'm kind of disappointed that I didn't get to see an unkillable Skarn with 50% hp shields on demand