In our case the node went down multiple times with different panic messages: PANIC : process on cpu8 hung (xor_cp_thread_2) for 5001 milliseconds! in SK process xor_cp_thread_2 on release 9.12.1P4 (C)...In our case the node went down multiple times with different panic messages: PANIC : process on cpu8 hung (xor_cp_thread_2) for 5001 milliseconds! in SK process xor_cp_thread_2 on release 9.12.1P4 (C) PANIC : thread (NwkThd_03) on cpu 8 hung for 4001 milliseconds in process NwkThd_03 on release 9.12.1P4 (C) PANIC : process on cpu8 hung (sd_main) for 5004 milliseconds! in SK process sd_main on release 9.12.1P4 (C) All these functions were hung on CPU 8.