[Samsung Galaxy S8 & S8+ Cross Device Development] jkaart:
Update:

I get these "Unknown IPI message 0x6" fatal errors when this problem triggering.

2023-04-22 03:35:09.746 0 0 root I [1: migration/1: 13] set_state_shutdown: mct_tick_stop (cpu1)
2023-04-22 03:35:09.746 0 0 root I [0: Binder:4266_2: 5304] CPU1: shutdown
2023-04-22 03:35:09.751 0 0 root I [2: migration/2: 18] set_state_shutdown: mct_tick_stop (cpu2)
2023-04-22 03:35:09.751 0 0 root I [0: Binder:4266_2: 5304] CPU2: shutdown
2023-04-22 03:35:09.755 0 0 root I [3: migration/3: 23] set_state_shutdown: mct_tick_stop (cpu3)
2023-04-22 03:35:09.755 0 0 root I [0: Binder:4266_2: 5304] CPU3: shutdown
2023-04-22 03:35:09.759 0 0 root I [4: migration/4: 28] set_state_shutdown: mct_tick_stop (cpu4)
2023-04-22 03:35:09.759 0 0 root I [0: Binder:4266_2: 5304] CPU4: shutdown
2023-04-22 03:35:09.762 0 0 root I [5: migration/5: 33] set_state_shutdown: mct_tick_stop (cpu5)
2023-04-22 03:35:09.762 0 0 root I [0: Binder:4266_2: 5304] CPU5: shutdown
2023-04-22 03:35:09.765 0 0 root I [6: migration/6: 38] set_state_shutdown: mct_tick_stop (cpu6)
2023-04-22 03:35:09.765 0 0 root I [0: Binder:4266_2: 5304] CPU6: shutdown
2023-04-22 03:35:09.768 0 0 root I [7: migration/7: 43] set_state_shutdown: mct_tick_stop (cpu7)
2023-04-22 03:35:09.769 0 0 root I [0: Binder:4266_2: 5304] CPU7: shutdown
2023-04-22 03:35:09.771 0 0 root I : [0: Binder:4266_2: 5304] s3c2410-wdt 10060000.watchdog: Watchdog keepalive!, wtcnt = fff5
2023-04-22 03:35:09.771 0 0 root I [0: Binder:4266_2: 5304] set_state_shutdown: mct_tick_stop (cpu0)
2023-04-22 03:35:09.771 0 0 root I [0: Binder:4266_2: 5304] EXYNOS-PM: exynos_pm_syscore_suspend: Enter Suspend scenario. (mode_idx = 8)
2023-04-22 03:35:09.771 0 0 root I : [0: Binder:4266_2: 5304] vfsspi_resume smc ret=0
2023-04-22 03:35:09.771 0 0 root I [0: Binder:4266_2: 5304] WAKEUP_STAT:
2023-04-22 03:35:09.771 0 0 root I : [0: Binder:4266_2: 5304] 0x80000001
2023-04-22 03:35:09.771 0 0 root I : [0: Binder:4266_2: 5304] 0x00000000
2023-04-22 03:35:09.771 0 0 root I [0: Binder:4266_2: 5304] EINT_PEND:
2023-04-22 03:35:09.771 0 0 root I : [0: Binder:4266_2: 5304] 0x80
2023-04-22 03:35:09.771 0 0 root I : [0: Binder:4266_2: 5304] 0x00
2023-04-22 03:35:09.771 0 0 root I : [0: Binder:4266_2: 5304] 0x00
2023-04-22 03:35:09.771 0 0 root I : [0: Binder:4266_2: 5304] 0x00
2023-04-22 03:35:09.771 0 0 root I : [0: Binder:4266_2: 5304] Resume caused by IRQ 328, dhdpcie_host_wake
2023-04-22 03:35:09.771 0 0 root I [0: Binder:4266_2: 5304] set_state_resume: mct_tick_stop(cpu0)
2023-04-22 03:35:09.771 0 0 root I [0: Binder:4266_2: 5304] set_state_shutdown: mct_tick_stop (cpu0)
2023-04-22 03:35:09.771 0 0 root I : [0: Binder:4266_2: 5304] s3c2410-wdt 10060000.watchdog: DISABLE_WDT reg val: feffffff, MASK_WDT_RESET reg val: feffffff
2023-04-22 03:35:09.771 0 0 root I : [0: Binder:4266_2: 5304] s3c2410-wdt 10060000.watchdog: Automatic_wdt set false done, mask = 0
2023-04-22 03:35:09.771 0 0 root I : [0: Binder:4266_2: 5304] s3c2410-wdt 10060000.watchdog: Watchdog stop done, WTCON = ee18
2023-04-22 03:35:09.771 0 0 root I : [0: Binder:4266_2: 5304] s3c2410-wdt 10060000.watchdog: DISABLE_WDT reg val: feffffff, MASK_WDT_RESET reg val: feffffff
2023-04-22 03:35:09.771 0 0 root I : [0: Binder:4266_2: 5304] s3c2410-wdt 10060000.watchdog: Mask_wdt_reset set false done, mask = 0
2023-04-22 03:35:09.771 0 0 root I : [0: Binder:4266_2: 5304] s3c2410-wdt 10060000.watchdog: watchdog disabled, con: 0x00005c00, dat: 0x0000fff5, cnt: 0x0000fff5
2023-04-22 03:35:09.771 0 0 root I : [0: Binder:4266_2: 5304] Enabling non-boot CPUs ...
2023-04-22 03:35:09.772 0 0 root I : [1: swapper/1: 0] Detected VIPT I-cache on CPU1
2023-04-22 03:35:09.772 0 0 root I [1: swapper/1: 0] set_state_shutdown: mct_tick_stop (cpu1)
2023-04-22 03:35:09.772 0 0 root I [1: swapper/1: 0] set_state_shutdown: mct_tick_stop (cpu1)
2023-04-22 03:35:09.772 0 0 root I [1: swapper/1: 0] CPU1: Booted secondary processor [410fd034]
2023-04-22 03:35:09.772 0 0 root F [1: swapper/1: 0] CPU1: Unknown IPI message 0x6
2023-04-22 03:35:09.773 0 0 root I : [0: Binder:4266_2: 5304] Trustonic TEE: __mc_switch_core: <- cpu=0x00000001, active_cpu=0x00000000
2023-04-22 03:35:09.773 0 0 root I : [0: Binder:4266_2: 5304]
2023-04-22 03:35:09.773 0 0 root I : [0: tee_fastcall: 1738] Trustonic TEE: mc_exec_core_switch: CoreSwap ok 0 -> 1
2023-04-22 03:35:09.773 0 0 root I : [0: Binder:4266_2: 5304] CPU1 is up
2023-04-22 03:35:09.773 0 0 root I : [2: swapper/2: 0] Detected VIPT I-cache on CPU2
2023-04-22 03:35:09.773 0 0 root I [2: swapper/2: 0] set_state_shutdown: mct_tick_stop (cpu2)
2023-04-22 03:35:09.773 0 0 root I [2: swapper/2: 0] set_state_shutdown: mct_tick_stop (cpu2)
2023-04-22 03:35:09.773 0 0 root I [2: swapper/2: 0] CPU2: Booted secondary processor [410fd034]
2023-04-22 03:35:09.773 0 0 root F [2: swapper/2: 0] CPU2: Unknown IPI message 0x6
2023-04-22 03:35:09.774 0 0 root I : [0: Binder:4266_2: 5304] CPU2 is up
2023-04-22 03:35:09.774 0 0 root I : [3: swapper/3: 0] Detected VIPT I-cache on CPU3
2023-04-22 03:35:09.774 0 0 root I [3: swapper/3: 0] set_state_shutdown: mct_tick_stop (cpu3)
2023-04-22 03:35:09.774 0 0 root I [3: swapper/3: 0] set_state_shutdown: mct_tick_stop (cpu3)
2023-04-22 03:35:09.774 0 0 root I [3: swapper/3: 0] CPU3: Booted secondary processor [410fd034]
2023-04-22 03:35:09.774 0 0 root F [3: swapper/3: 0] CPU3: Unknown IPI message 0x6
2023-04-22 03:35:09.775 0 0 root I : [0: Binder:4266_2: 5304] CPU3 is up
2023-04-22 03:35:09.775 0 0 root I : [4: swapper/4: 0] Detected VIPT I-cache on CPU4
2023-04-22 03:35:09.776 0 0 root I [4: swapper/4: 0] set_state_shutdown: mct_tick_stop (cpu4)
2023-04-22 03:35:09.776 0 0 root I [4: swapper/4: 0] set_state_shutdown: mct_tick_stop (cpu4)
2023-04-22 03:35:09.776 0 0 root I [4: swapper/4: 0] CPU4: Booted secondary processor [534f0010]
2023-04-22 03:35:09.776 0 0 root F [4: swapper/4: 0] CPU4: Unknown IPI message 0x6
2023-04-22 03:35:09.776 0 0 root I [0: Binder:4266_2: 5304] exynos_acme: CPUFREQ domain1 registered
2023-04-22 03:35:09.777 0 0 root I : [0: Binder:4266_2: 5304] CPU4 is up
2023-04-22 03:35:09.777 0 0 root I : [5: swapper/5: 0] Detected VIPT I-cache on CPU5
2023-04-22 03:35:09.777 0 0 root I [5: swapper/5: 0] set_state_shutdown: mct_tick_stop (cpu5)
2023-04-22 03:35:09.777 0 0 root I [5: swapper/5: 0] set_state_shutdown: mct_tick_stop (cpu5)
2023-04-22 03:35:09.777 0 0 root I [5: swapper/5: 0] CPU5: Booted secondary processor [534f0010]
2023-04-22 03:35:09.777 0 0 root F [5: swapper/5: 0] CPU5: Unknown IPI message 0x6
2023-04-22 03:35:09.778 0 0 root I : [0: Binder:4266_2: 5304] CPU5 is up
2023-04-22 03:35:09.778 0 0 root I : [6: swapper/6: 0] Detected VIPT I-cache on CPU6
2023-04-22 03:35:09.778 0 0 root I [6: swapper/6: 0] set_state_shutdown: mct_tick_stop (cpu6)
2023-04-22 03:35:09.778 0 0 root I [6: swapper/6: 0] set_state_shutdown: mct_tick_stop (cpu6)
2023-04-22 03:35:09.778 0 0 root I [6: swapper/6: 0] CPU6: Booted secondary processor [534f0010]
2023-04-22 03:35:09.778 0 0 root F [6: swapper/6: 0] CPU6: Unknown IPI message 0x6
2023-04-22 03:35:09.779 0 0 root I : [0: Binder:4266_2: 5304] CPU6 is up
2023-04-22 03:35:09.779 0 0 root I : [7: swapper/7: 0] Detected VIPT I-cache on CPU7
2023-04-22 03:35:09.779 0 0 root I [7: swapper/7: 0] set_state_shutdown: mct_tick_stop (cpu7)
2023-04-22 03:35:09.779 0 0 root I [7: swapper/7: 0] set_state_shutdown: mct_tick_stop (cpu7)
2023-04-22 03:35:09.779 0 0 root I [7: swapper/7: 0] CPU7: Booted secondary processor [534f0010]
2023-04-22 03:35:09.779 0 0 root F [7: swapper/7: 0] CPU7: Unknown IPI message 0x6
2023-04-22 03:35:09.780 0 0 root I : [0: Binder:4266_2: 5304] CPU7 is up

In attached log file 03:35:09 incoming calls failed but 03:35:28 phone accept phone call's.

Maybe this help if anyone is interested...

Edit: Why I can't upload and attach text file logs here?

Anyway it's now zip file...

Edit2: no, this fatal error is not the cause of this problem.

But maybe CS Fallback (i.e Circuit Switched Fallback or CSFB) is lagging or even crash sometimes and phone do not receive calls?!