SoftDevice S113 interrupt priority levels: 0, 1 and 4 or 6?

[andy4]

Does SoftDevice S113 use interrupt priority level 4, or are the actual S113 interrupt priorities 0, 1 and 6?

As I understand it, this says S113 uses priority levels 0, 1 and 4:

https://infocenter.nordicsemi.com/topic/sds_s113/SDS/s1xx/processor_avail_interrupt_latency/exception_mgmt_sd.html

But SD_EVT_IRQHandler seems to use priority 6.

I see priority 6 returned from current_int_priority_get() inside my NRF_SDH_BLE_OBSERVER handler, with NRF_SDH_DISPATCH_MODEL 0. It also says 6 in nrf_soc.h and in 

https://infocenter.nordicsemi.com/index.jsp?topic=%2Fcom.nordic.infocenter.s113.api.v7.0.1%2Fgroup__nrf__soc__api.html

[Drill down through Defines to SD_EVT_IRQHandler]

[andy4]

>> I am not sure whether it is possible to change this event priority.

The reference I gave says "The priorities of the interrupts reserved by the SoftDevice cannot be changed."

It was causing nothing to work when the application was avoiding priority 4 and using priority 6.

Could you possibly look into this a little further?