I forced an assert in radio_event_adv_prepare by setting "_radio.tocker_id_prepare = 1”. All I see is:
***** HARD FAULT ***** Executing thread ID (thread): 0x200007a8 Faulting instruction address: 0xbc76
No additional logging.
[vich] Are you using the upstream master as-is? Or you have modified the default configurations? BT_ERR message when ASSERTing should be printed out on UART by default for the peripheral sample.