Here is the log info, using the latest Merlin FW 3004.388.6_2, I don't remember this happening prior to _2, but I am not 100% sure.
Feb 28 07:58:58 kernel: potentially unexpected fatal signal 11.
Feb 28 07:58:58 kernel: CPU: 3 PID: 18686 Comm: httpd Tainted: P O 4.19.183 #1
Feb 28 07:58:58 kernel: Hardware name: RTAX88U_PRO_gpy211 (DT)
Feb 28 07:58:58 kernel: pstate: a00f0010 (NzCv q A32 LE aif)
Feb 28 07:58:58 kernel: pc : 00000000f7c47d0c
Feb 28 07:58:58 kernel: lr : 00000000f7c47750
Feb 28 07:58:58 kernel: sp : 00000000ffc585a0
Feb 28 07:58:58 kernel: x12: 0000000000000014
Feb 28 07:58:58 kernel: x11: 000000000000000b x10: 0000000000000078
Feb 28 07:58:58 kernel: x9 : 00000000020a9df4 x8 : 0000000000000000
Feb 28 07:58:58 kernel: x7 : 000000000202d890 x6 : 0000000000000000
Feb 28 07:58:58 kernel: x5 : 0000000000000000 x4 : 0000000000000000
Feb 28 07:58:58 kernel: x3 : 00000000020b3b90 x2 : 00000000020a9df0
Feb 28 07:58:58 kernel: x1 : 0000000000000010 x0 : 00000000ffffffff
Feb 28 07:59:02 watchdog: start httpd
Feb 28 07:59:02 rc_service: watchdog 2328:notify_rc start_httpd
Feb 28 07:59:02 RT-AX88U_Pro: start httpd:80
Feb 28 07:58:58 kernel: potentially unexpected fatal signal 11.
Feb 28 07:58:58 kernel: CPU: 3 PID: 18686 Comm: httpd Tainted: P O 4.19.183 #1
Feb 28 07:58:58 kernel: Hardware name: RTAX88U_PRO_gpy211 (DT)
Feb 28 07:58:58 kernel: pstate: a00f0010 (NzCv q A32 LE aif)
Feb 28 07:58:58 kernel: pc : 00000000f7c47d0c
Feb 28 07:58:58 kernel: lr : 00000000f7c47750
Feb 28 07:58:58 kernel: sp : 00000000ffc585a0
Feb 28 07:58:58 kernel: x12: 0000000000000014
Feb 28 07:58:58 kernel: x11: 000000000000000b x10: 0000000000000078
Feb 28 07:58:58 kernel: x9 : 00000000020a9df4 x8 : 0000000000000000
Feb 28 07:58:58 kernel: x7 : 000000000202d890 x6 : 0000000000000000
Feb 28 07:58:58 kernel: x5 : 0000000000000000 x4 : 0000000000000000
Feb 28 07:58:58 kernel: x3 : 00000000020b3b90 x2 : 00000000020a9df0
Feb 28 07:58:58 kernel: x1 : 0000000000000010 x0 : 00000000ffffffff
Feb 28 07:59:02 watchdog: start httpd
Feb 28 07:59:02 rc_service: watchdog 2328:notify_rc start_httpd
Feb 28 07:59:02 RT-AX88U_Pro: start httpd:80