Hardware/schematic issue: My design is destroying microcontrollers, why?

[MLind.3]

I have had the PCB professionally produced for this prototype board. But for some reason every time i try to build the board, the STM32F407 microcontroller gets destroyed at power on. I have narrowed it down to when i populate the filter on the VDDA/VREF+ pins. What is wrong with my schematic? Also, thanks community for being a wealth of information for many years!

[MLind.3]

I finally managed to get my board working. Though i am sad to say i have no idea why five consecutive boards broke and this sixth one works. So no real conclusion i am afraid. Huge thanks to the community however for your eagerness to help a poor bloke out!