Don't know if this is a problem? router.asus.com fails on RT-AC86U. 192.168.50.1 works and system log shows these lines...
Dec 3 10:47:24 kernel: pgd = ffffffc0152dd000
Dec 3 10:47:24 kernel: [004b30f4] *pgd=00000000152e1003, *pud=00000000152e1003, *pmd=0000000014807003, *pte=0000000000000000
Dec 3 10:47:24 kernel: CPU: 0 PID: 791 Comm: httpd Tainted: P O 4.1.27 #2
Dec 3 10:47:24 kernel: Hardware name: Broadcom-v8A (DT)
Dec 3 10:47:24 kernel: task: ffffffc01e022b80 ti: ffffffc0153d0000 task.ti: ffffffc0153d0000
Dec 3 10:47:24 kernel: PC is at 0xf6f40aa0
Dec 3 10:47:24 kernel: LR is at 0x26cc4
Dec 3 10:47:24 kernel: pc : [<00000000f6f40aa0>] lr : [<0000000000026cc4>] pstate: 20000010
Dec 3 10:47:24 kernel: sp : 00000000ff86b408
Dec 3 10:47:24 kernel: x12: 000000000008c71c
Dec 3 10:47:24 kernel: x11: 00000000000791e0 x10: 0000000000000001
Dec 3 10:47:24 kernel: x9 : 000000000049f530 x8 : 0000000000000000
Dec 3 10:47:24 kernel: x7 : 00000000004b30e8 x6 : 000000000048d380
Dec 3 10:47:24 kernel: x5 : 00000000004b3260 x4 : 00000000004b30e8
Dec 3 10:47:24 kernel: x3 : 00000000f6dec7a8 x2 : 00000000f6dec7a8
Dec 3 10:47:24 kernel: x1 : 0000000000000000 x0 : 00000000004b30e8
Dec 3 10:47:42 watchdog: restart httpd
Dec 3 10:47:42 rc_service: watchdog 802:notify_rc stop_httpd
Dec 3 10:47:42 rc_service: watchdog 802:notify_rc start_httpd
Dec 3 10:47:42 RT-AC86U: start https:8443
Dec 3 10:47:42 RT-AC86U: start httpd:80
Router seems to be working like it should though.
I am having the same issue. It kicks my wifi devices off while it restarts the service: Log:
Dec 6 10:52:23 kernel: httpd[782]: unhandled level 3 translation fault (11) at 0x0041306c, esr 0x92000007
Dec 6 10:52:23 kernel: pgd = ffffffc015382000
Dec 6 10:52:23 kernel: [0041306c] *pgd=00000000152d9003, *pud=00000000152d9003, *pmd=0000000015013003, *pte=0000000000000000
Dec 6 10:52:23 kernel: CPU: 1 PID: 782 Comm: httpd Tainted: P O 4.1.27 #2
Dec 6 10:52:23 kernel: Hardware name: Broadcom-v8A (DT)
Dec 6 10:52:23 kernel: task: ffffffc01e022b80 ti: ffffffc0153f8000 task.ti: ffffffc0153f8000
Dec 6 10:52:23 kernel: PC is at 0xf6bdfaa0
Dec 6 10:52:23 kernel: LR is at 0x26cd4
Dec 6 10:52:23 kernel: pc : [<00000000f6bdfaa0>] lr : [<0000000000026cd4>] pstate: 20000010
Dec 6 10:52:23 kernel: sp : 00000000ffb07d58
Dec 6 10:52:23 kernel: x12: 000000000008c71c
Dec 6 10:52:24 kernel: x11: 00000000000791e0 x10: 0000000000000001
Dec 6 10:52:24 kernel: x9 : 000000000039a750 x8 : 0000000000000000
Dec 6 10:52:24 kernel: x7 : 000000000038f410 x6 : 00000000003a5d90
Dec 6 10:52:24 kernel: x5 : 0000000000413060 x4 : 0000000000413060
Dec 6 10:52:24 kernel: x3 : 00000000ffffffff x2 : 00000000f6a8b7a8
Dec 6 10:52:24 kernel: x1 : 0000000000000000 x0 : 0000000000413060
Dec 6 10:52:31 watchdog: restart httpd
Dec 6 10:52:31 rc_service: watchdog 790:notify_rc stop_httpd
Dec 6 10:52:31 rc_service: watchdog 790:notify_rc start_httpd
Dec 6 10:52:31 RT-AC86U: start https:8443
Dec 6 10:52:31 RT-AC86U: start httpd:80