I'm studying a SB 3bet vs BTN defend flop spot where SB picks 65% bet size.

The flop is 8s 4s 2d

I'm looking at how does PIO plays KQ combos

IP defends 100% of KsQx hands but its folding when we have spades+diamonds

I understand why non spade combos are folded but why does it fold spade+diamond combos?

KsQd folds 55%
KdQs folds 90%

Can someone explain whats going on here please- attached screenshot of the same

https://gyazo.com/d2e191ab0b1b04f664845a91de03058e