For some reason every out there has a hefty -20 opinion from me having high crown authority for some reason. I thought it applied only to vassals?
It's been reported before and cannot be fixed by modders. If Paradox are aware of it, a fix isn't forthcoming, since no work has been done on fixing CK2 bugs for over a year now.
Why would it be a bug ?
As far as i recall the CA is relevant for anyone in the de jure territory, vasssal or independent.
Hence the opinion penalty.
It also applies to non-de jure rulers halfway across the map.