Why does 4* Vander get worse..?

At 3* he receives 180% AP armor and magic resist. At 4* that dropped to 175%...? All he gained was some extra health and AD. Had the anomaly where he deals a percent of damage blocked to adjacent enemies so he started doing less damage after hitting 4*.

I understand the damage % and bonus damage % not changing since it is the same 1-3 but feel like something was overlooked here

At 3* he receives 180% AP armor and magic resist. At 4* that dropped to 175%...? All he gained was some extra health and AD. Had the anomaly where he deals a percent of damage blocked to adjacent enemies so he started doing less damage after hitting 4*.

I understand the damage % and bonus damage % not changing since it is the same 1-3 but feel like something was overlooked here