After 2 days of uptime on 384.8.2 it seems 5Ghz band drops out, it happens every two days of uptime. Here is the log when it does happen.
Dec 16 04:04:41 kernel: DUMP CONSOLE: 0x00ec8166 0x00ec8166
Dec 16 04:04:41 kernel: DUMP CONSOLE: 233586.527 0x00fe8166 0x00fe8166 0x00fe8166 0x00ec8166
Dec 16 04:04:41 kernel: DUMP CONSOLE: 233586.527 0x00fe8166 0x00fe8166 0x00fe8166 0x00ec8166
Dec 16 04:04:41 kernel: DUMP CONSOLE: 233586.527 0x00c98166 0x00fe8166 0x00fe8166 0x00fe8166
Dec 16 04:04:41 kernel: DUMP CONSOLE: 233586.527 PC (psmdebug):
Dec 16 04:04:41 kernel: DUMP CONSOLE: 233586.527 0x00ff8028 0x00ff8046 0x00fe805b 0x00ff809c
Dec 16 04:04:41 kernel: DUMP CONSOLE: 233586.527 0x00ff8028 0x00ff8047 0x00ff8060 0x00ff809c
Dec 16 04:04:41 kernel: DUMP CONSOLE: 233586.527 psmx stack_status : 0x1
Dec 16 04:04:41 kernel: DUMP CONSOLE: 233586.527 psmx stack_entries:
Dec 16 04:04:41 kernel: DUMP CONSOLE: 233586.527 0x002f
Dec 16 04:04:41 kernel: DUMP CONSOLE: 233586.527 0x0141
Dec 16 04:04:41 kernel: DUMP CONSOLE: 233586.527 0x0176
Dec 16 04:04:41 kernel: DUMP CONSOLE: 233586.527 0x01e6
Dec 16 04:04:41 kernel: DUMP CONSOLE: 233586.527 0x1ffd
Dec 16 04:04:41 kernel: DUMP CONSOLE: 233586.527 0x1fdd
Dec 16 04:04:41 kernel: DUMP CONSOLE: 233586.527 0x1ffd
Dec 16 04:04:41 kernel: DUMP CONSOLE: 233586.527 0x07f7
Dec 16 04:04:41 kernel: DUMP CONSOLE: 233586.527 txe_vasip_intsts 0x0
Dec 16 04:04:41 kernel: DUMP CONSOLE: 233586.527 wl1: fatal error, reinitializing
Dec 16 04:04:41 kernel: DUMP CONSOLE: 233586.528 wlc_ucode_download: wl1: Loading MU ucode
Dec 16 04:04:41 kernel: DUMP CONSOLE: 233586.540 wl1: CORE INIT : nfifo 32 mu_tx_enab 1
Dec 16 04:04:41 kernel: DUMP CONSOLE: 233586.541 wl1: CORE INIT : mode 2 pktclassify 1 rxsplit 0 hdr conve 0 DMA_CT Enabled
Dec 16 04:04:41 kernel: DUMP CONSOLE: 233586.550 wl1 wlc_txbf_set_shm_idx: scb aleady has user index 255
Dec 16 04:04:41 kernel: DUMP CONSOLE: 233586.550 wl1 wlc_txbf_set_shm_idx: scb aleady has user index 255
Dec 16 04:04:41 kernel: DUMP CONSOLE: 233586.554 wlc_mutx_watchdog: PSMx wds diff = 1
Dec 16 04:04:41 kernel: DUMP CONSOLE: 233586.554 wlc_mutx_watchdog: 2 PSMx wds in 5 seconds
Dec 16 04:04:41 kernel: DUMP CONSOLE: 233586.555 enable 1: q0 frmcnt 0, wrdcnt 0, q1 frmcnt 0, wrdcnt 0
Dec 16 04:04:41 kernel: DUMP CONSOLE: 233586.555 enable 1: q0 frmcnt 0, wrdcnt 0, q1 frmcnt 0, wrdcnt 0
Dec 16 04:04:41 kernel: DUMP CONSOLE: 233586.555 wlc_ucode_download: wl1: Loading non-MU ucode
Dec 16 04:04:41 kernel: DUMP CONSOLE: 233586.570 wl1: CORE INIT : nfifo 6 mu_tx_enab 0
Dec 16 04:04:41 kernel: DUMP CONSOLE: 233586.570 wl1: CORE INIT : mode 2 pktclassify 1 rxsplit 0 hdr conve 0 DMA_CT Disabled
Dec 16 04:04:41 kernel: DUMP CONSOLE: 233586.583 wlc_ucode_download: wl1: Loading non-MU ucode
Dec 16 04:04:41 kernel: dhdpcie_checkdied: msgtrace address : 0x00000000
Dec 16 04:04:41 kernel: console address : 0x003FFCF0
Dec 16 04:04:41 kernel: Assrt not built in dongle
Dec 16 04:04:41 kernel: TRAP type 0x4 @ epc 0x207e7c, cpsr 0x8000193, spsr 0x8000033, sp 0x2acd78, lp 0x207e5d, rpc 0x207e7c
Dec 16 04:04:41 kernel: Trap offset 0x2acd20, r0 0x83c, r1 0x0, r2 0x14, r3 0x3f8c10, r4 0x3ee820, r5 0x3f68a0, r6 0x3f017c, r7 0x3f4790
Dec 16 04:04:45 rc_service: restart_wireles 22117:notify_rc stop_amas_wlcconnect
Dec 16 04:04:45 rc_service: restart_wireles 22117:notify_rc stop_amas_bhctrl
Dec 16 04:04:45 rc_service: waitting "stop_amas_wlcconnect" via restart_wireles ...
Dec 16 04:04:46 rc_service: restart_wireles 22117:notify_rc stop_obd
Dec 16 04:04:46 rc_service: waitting "stop_amas_bhctrl" via restart_wireles ...
Dec 16 04:04:48 kernel: br0: port 2(eth1) entering forwarding state
Dec 16 04:04:48 kernel: device eth1 left promiscuous mode
Dec 16 04:04:48 kernel: br0: port 2(eth1) entering disabled state
Dec 16 04:04:52 kernel: device eth1 entered promiscuous mode
Dec 16 04:04:52 kernel: br0: topology change detected, propagating
Dec 16 04:04:52 kernel: br0: port 2(eth1) entering forwarding state
Dec 16 04:04:52 kernel: br0: port 2(eth1) entering forwarding state
RT-AC88U 384.8.2