NRF52 PM_EVT_ERROR_UNEXPECTED problem with connection

[Mario]

hello,

I used nrf52 and softdevice 2.0.1 and i have a big problem.

For some times the BT works perfectly but after i connect more then 4 devices for some reason the device return PM_EVT_ERROR_UNEXPECTED end stop working. The reset do not help i used sd_nvic_SystemReset() and NVIC_SystemReset() even i trya power off the BT module, but this error still happens

i received this error(PM_EVT_ERROR_UNEXPECTED) every time when i want to connect to a BT module to a phone.

Any ideas what cause this.

[Mario]

static uint32_t const * fs_flash_page_end_addr() { uint32_t const bootloader_addr = NRF_UICR->NRFFW[0];

    return  (uint32_t*)((bootloader_addr != FS_ERASED_WORD) ? bootloader_addr :
                                                              NRF_FICR->CODESIZE * FS_PAGE_SIZE);
}

#define FS_PAGE_END_ADDR    (fs_flash_page_end_addr())

static __INLINE uint32_t pstorage_flash_page_end()
{
   uint32_t bootloader_addr = NRF_UICR->NRFFW[0];
  
   return ((bootloader_addr != PSTORAGE_FLASH_EMPTY_MASK) ?
           (bootloader_addr/ PSTORAGE_FLASH_PAGE_SIZE) : NRF_FICR->CODESIZE);
}

#define PSTORAGE_FLASH_PAGE_END     pstorage_flash_page_end()

These are the macros and functions in question. Do you need any additional information from my side?

What can I do in order to fix this?

Thank you very much in advance!