Prioritize BLE interrupts above FreeRTOS
Otherwise critical sections inside FreeRTOS will break the BLE stack.
Idea is to trigger other lower priority interrupts from the BLE interrupts when a FreeRTOS function should be called.
May this can help: https://developer.arm.com/docs/dui0553/a/cortex-m4-peripherals/nested-vectored-interrupt-controller/software-trigger-interrupt-register