This is on an Rpi B3+ runint aarch64. I have noticed that, periodically I get disconnected and it doe snot reconnect. I am using connman to manage the iwd connection. This is the first time I have seen the crash in the log. It has been crashing and not recovering.

It gets a Deauth event (I've seen this quite a bit) and usually, it will not reconnect until I reboot it and my router. How can I best diagnose this?

It is iwd 1.7 and connman 1.38. potentially useful excerpts from my journal:

Jun 17 23:26:58 rune64 kernel: Booting Linux on physical CPU 0x0000000000 [0x410fd034]
Jun 17 23:26:58 rune64 kernel: Linux version 5.4.44-1-ARCH (alarm@buildrune64) (gcc version 9.3.0 (GCC)) #1 SMP PREEMPT Mon Jun 22 15:13:50 CDT 2020
Jun 17 23:26:58 rune64 kernel: Machine model: Raspberry Pi 3 Model B Plus Rev 1.3

...

Jun 17 23:26:58 rune64 kernel: raspberrypi-firmware soc:firmware: Attached to firmware from 2020-06-10 17:52, variant start_cd
Jun 17 23:26:58 rune64 kernel: raspberrypi-firmware soc:firmware: Firmware hash is e46bba1638cca2708b31b9daf4636770ef981735

...

Jun 17 23:26:59 rune64 kernel: brcmfmac: F1 signature read @0x18000000=0x15264345
Jun 17 23:26:59 rune64 kernel: brcmfmac: brcmf_fw_alloc_request: using brcm/brcmfmac43455-sdio for chip BCM4345/6
Jun 17 23:26:59 rune64 kernel: usbcore: registered new interface driver brcmfmac

...

Jun 17 23:27:00 rune64 kernel: brcmfmac: brcmf_fw_alloc_request: using brcm/brcmfmac43455-sdio for chip BCM4345/6
Jun 17 23:27:00 rune64 kernel: brcmfmac: brcmf_c_preinit_dcmds: Firmware: BCM4345/6 wl0: Feb 27 2018 03:15:32 version 7.45.154 (r684107 CY) FWID 01-4fbe0b04

...

Jun 24 22:28:10 rune64 iwd[261]: Wireless daemon version 1.7
Jun 24 22:28:10 rune64 iwd[261]: Loaded configuration from /etc/iwd/main.conf
Jun 24 22:28:10 rune64 systemd[1]: Started Wireless service.
Jun 24 22:28:10 rune64 iwd[261]: netconfig: Network configuration is disabled.
Jun 24 22:28:10 rune64 iwd[261]: Wiphy: 0, Name: phy0
Jun 24 22:28:10 rune64 iwd[261]:         Permanent Address: b8:27:eb:52:cc:d0
Jun 24 22:28:10 rune64 iwd[261]:         Bands: 2.4 GHz 5 GHz
Jun 24 22:28:10 rune64 iwd[261]:         Ciphers: CCMP TKIP BIP
Jun 24 22:28:10 rune64 iwd[261]:         Supported iftypes: ad-hoc station ap p2p-client p2p-go p2p-device
Jun 24 22:28:10 rune64 iwd[261]: Wiphy phy0 will only use the default interface
Jun 24 22:28:11 rune64 iwd[261]: hardware_rekey not supported

Jun 25 13:40:14 rune64 iwd[261]: Received Deauthentication event, reason: 2, from_ap: false