Hi! I think I found a bug gap in my fundamental understanding, because PIO shows me the results that I cant explain.

So, the hand was 3bet pot SBvsBTN and X/C 33% 5d4c2d.
On the Xd turn IP has equity AND nuts advantage, and I thought that is the case for big/over bet. BUT
Solver always choose 33% only here OTT and mostly has 2.5x AI bet OTR.
The only explanation I can find why is that heppening is IP has big nuts advantage and dont need that much protection and IP is maximizing EV of bluffs by keeping the OOP range wide and make it fold OTR. Am I close?