Here is a issue I dealt with. I am not saying this is yours, But it would be worth checking.
I saw your motor is boosted. I have seen a blown head gasket take out a aluminum radiator . On newer cars they blow the plastic tanks off.. On welded race radiators it blows the tubes in the radiator up. They become round instead of being oval. When this happens it prevents air flow . You cannot physically see this in the car.
I noticed this with an electric fan running and I didn't feel air when standing at the fender. I put a piece of paper in front of the radiator and there was little to no suction. After I took the radiator out you could not see through it with a light behind it. I bought a new radiator. Cooling problems were gone.
High instant pressure from a high pressure head gasket failure will cause this when you blow a head gasket at rpm's or under high boost. As well as a radiator freezing. Just something I would check. You never know. A radiator not only needs to flow water . It needs to flow air . I have seen front mount inter-coolers and trans-coolers do the same thing.
Maybe your car has a air flow problem? If you have room to hold a bright light behind the radiator you should clearly see it through what ever is in front of it in all core areas. Easy to check. If you restrict air flow this could be your problem.
Just some info you may want to use. Steve