STM32H7 BOOT0 pin not working

Greetings,

I am having difficulties with connecting to my STM32H745IIK6. Normal mode doesn't work as well as Connect under reset. NRST pin works as it halts the program, and the program is running normally otherwise.

But the weirdest thing is that connecting the BOOT0 pin to +3V3 and reseting the MCU doesn't cause it to boot from System memory, it still boots from Flash memory and runs the program. I haven't changed any BOOT option bytes.

Does anyone know the solution to this?

BR

Domagoj