Resolved! SPI Slave Receiving Every Other Byte
I am using STM32H7B3I-DK running a touchgfx application and acting as SPI Master, and Nucleo-H743ZI as SPI Slave. Both are configured in interrupt mode not using HWNSS. The Master is sending 0,1,2,3,4,5,6,7, but the slave is only receiving 0,2,4,6,0,...