I am going to second the fact that the SD and DMA interrupts need to be the same priority and that Cube needs to enforce it.

Tried 2nd solution...does not work.../* USER CODE BEGIN BeforeReadDMABlocksSection *//* can be used to modify previous code / undefine following code / add code *//* USER CODE END BeforeReadDMABlocksSection *//** * @brief Reads block(s) from a specif...

I am running into this issue on the STM32L496 and I am going to try the 2nd solution. I had no issue with the STM32F405 in this regard and it used different DMA channels for both TX and RX.