Sending a downlink to non-registered device_EUI causes failure (RAK7268)

RAK7268 1.2.3_RAK rRAK-a6e14b0

If the gateway receives a MQTT downlink message to a device_EUI that is not registered the system seems to fail and restart. For example:

Mon Nov 22 23:52:04 2021 daemon.info appSrv[11496]: [Downlink] - {"confirmed":false,"fPort":2,"data":"050A"}
Mon Nov 22 23:52:06 2021 user.notice breathing_light: set breathing light to ABNORMAL
Mon Nov 22 23:52:06 2021 daemon.info loraSrv[12952]: Initializing signal handlers
Mon Nov 22 23:52:06 2021 daemon.info evloop[12952]: evloopInit Done.
Mon Nov 22 23:52:06 2021 daemon.info md[12952]: mdInit Done.
Mon Nov 22 23:52:06 2021 daemon.info mqttEv[12952]: mqttEvInit Done.
Mon Nov 22 23:52:06 2021 daemon.info unknown[12952]: gwManagerInit: Init gateway Manager
Mon Nov 22 23:52:06 2021 daemon.info gwBridge[12952]: gwBridgeConfigInit: New Gateway ac1f09fffe03bf89
Mon Nov 22 23:52:06 2021 daemon.info gwManager[12952]: gwBridgeCreateGateway: Create Gateway ac1f09fffe03bf89
Mon Nov 22 23:52:06 2021 daemon.info bufrd[12952]: bufrdInit Done.
Mon Nov 22 23:52:06 2021 daemon.info gwBridge[12952]: MQTT Init Start
Mon Nov 22 23:52:06 2021 daemon.info gwBridge[12952]: Mqtt - version 3.1
Mon Nov 22 23:52:06 2021 daemon.info gwBridge[12952]: Mqtt - Client ID gwbackend-ac1f09fffe03bf89
Mon Nov 22 23:52:06 2021 daemon.info gwBridge[12952]: Mqtt - Retain 0
Mon Nov 22 23:52:06 2021 daemon.info gwBridge[12952]: Mqtt - Clean Session 1
Mon Nov 22 23:52:06 2021 daemon.info gwBridge[12952]: Mqtt - Qos 1
Mon Nov 22 23:52:07 2021 daemon.info gwBridge[12952]: Mqtt - keepalive 10
Mon Nov 22 23:52:07 2021 daemon.info mqttEv[12952]: mqttEvRegister : Register mosquitto event [gwBridgeS Mqtt Client]
Mon Nov 22 23:52:07 2021 daemon.info gwBridge[12952]: MQTT Init Done
Mon Nov 22 23:52:07 2021 daemon.err db[12952]: MoteChannelStorage size 112
Mon Nov 22 23:52:07 2021 daemon.info db[12952]: Valid db File /mnt/mmcblk0p1/lorasrv/mote_db
Mon Nov 22 23:52:07 2021 daemon.info nwkSrv[12952]: Disable Frame-counter Validate : false
Mon Nov 22 23:52:07 2021 daemon.err unknown[12952]: us915_band_add_channel : Enable Channel 8 - 903900000; ChannelsMask[0] = 0100
Mon Nov 22 23:52:07 2021 daemon.err unknown[12952]: us915_band_add_channel : Enable Channel 9 - 904100000; ChannelsMask[0] = 0300
Mon Nov 22 23:52:07 2021 daemon.err unknown[12952]: us915_band_add_channel : Enable Channel 10 - 904300000; ChannelsMask[0] = 0700
Mon Nov 22 23:52:07 2021 daemon.err unknown[12952]: us915_band_add_channel : Enable Channel 11 - 904500000; ChannelsMask[0] = 0F00
Mon Nov 22 23:52:07 2021 daemon.err unknown[12952]: us915_band_add_channel : Enable Channel 12 - 904700000; ChannelsMask[0] = 1F00
Mon Nov 22 23:52:07 2021 daemon.err unknown[12952]: us915_band_add_channel : Enable Channel 13 - 904900000; ChannelsMask[0] = 3F00
Mon Nov 22 23:52:07 2021 daemon.err unknown[12952]: us915_band_add_channel : Enable Channel 14 - 905100000; ChannelsMask[0] = 7F00
Mon Nov 22 23:52:07 2021 daemon.err unknown[12952]: us915_band_add_channel : Enable Channel 15 - 905300000; ChannelsMask[0] = FF00
Mon Nov 22 23:52:07 2021 daemon.err unknown[12952]: us915_band_add_channel : Enable Channel 65 - 904600000; ChannelsMask[4] = 0002
Mon Nov 22 23:52:07 2021 daemon.info lorawan[12952]: LoRaMAC Params - RECEIVE_DELAY1 1000000 us
Mon Nov 22 23:52:07 2021 daemon.info lorawan[12952]: LoRaMAC Params - RX1DrOffset 0
Mon Nov 22 23:52:07 2021 daemon.info lorawan[12952]: LoRaMAC Params - RX2 Window Channel 923300000 DR 8
Mon Nov 22 23:52:07 2021 daemon.info lorawan[12952]: LoRaMac Params - UplinkDwellTime 0
Mon Nov 22 23:52:07 2021 daemon.info lorawan[12952]: LoRaMac Params - DownlinkDwellTime 0
Mon Nov 22 23:52:07 2021 daemon.info lorawan[12952]: LoRaMac Params - Max EIRP 0
Mon Nov 22 23:52:07 2021 daemon.info appSrv[12952]: Mqtt - version 3.1.1
Mon Nov 22 23:52:07 2021 daemon.info appSrv[12952]: Mqtt - Client ID 8e650d52940381f031f230f6ba6186e1336a3f112765654496b980bab7e31bc0-918100C910B00015
Mon Nov 22 23:52:07 2021 daemon.info appSrv[12952]: Mqtt - Retain 0
Mon Nov 22 23:52:07 2021 daemon.info appSrv[12952]: Mqtt - Clean Session 1
Mon Nov 22 23:52:07 2021 daemon.info appSrv[12952]: Mqtt - Qos 0
Mon Nov 22 23:52:07 2021 daemon.info appSrv[12952]: Mqtt - keepalive 10
Mon Nov 22 23:52:07 2021 daemon.info appSrv[12952]: CA CERT File /etc/lorasrv/ca.crt
Mon Nov 22 23:52:07 2021 daemon.info appSrv[12952]: CA Path null
Mon Nov 22 23:52:07 2021 daemon.info appSrv[12952]: Client CERT File /etc/lorasrv/tls.crt
Mon Nov 22 23:52:07 2021 daemon.info appSrv[12952]: Client Key File /etc/lorasrv/tls.key
Mon Nov 22 23:52:07 2021 daemon.info appSrv[12952]: TLS Version : tlsv1.2
Mon Nov 22 23:52:07 2021 daemon.info mqttEv[12952]: mqttEvRegister : Register mosquitto event [AppSrv Mqtt Client]
Mon Nov 22 23:52:07 2021 daemon.info appSrv[12952]: appMosqInit: mosq init done
Mon Nov 22 23:52:07 2021 daemon.info mqttEv[12952]: mqttEvRegister : Register mosquitto event [AppSrv Local Mqtt Client]
Mon Nov 22 23:52:07 2021 daemon.info appSrv[12952]: appLocalMosqInit: local mosq init done
Mon Nov 22 23:52:07 2021 daemon.info evloop[12952]: ENTER evloopRun
Mon Nov 22 23:52:07 2021 daemon.info appSrv[12952]: appLocalMqttConnectCB: [AppSrv Local Mqtt Client] Connect Success ...
Mon Nov 22 23:52:07 2021 daemon.info gwBridge[12952]: mosqConnectCB: Mqtt Connect Success ...
Mon Nov 22 23:52:07 2021 daemon.info mqttEv[12952]: [gwBridgeS Mqtt Client] subscribe gateway/+/rx - QOS 1
Mon Nov 22 23:52:07 2021 daemon.info mqttEv[12952]: [gwBridgeS Mqtt Client] subscribe gateway/+/stats - QOS 1
Mon Nov 22 23:52:07 2021 daemon.info mqttEv[12952]: [gwBridgeS Mqtt Client] subscribe gateway/+/ack - QOS 1
Mon Nov 22 23:52:07 2021 daemon.info appSrv[12952]: appMqttConnectCB: [AppSrv Mqtt Client] Connect Success ...
Mon Nov 22 23:52:07 2021 daemon.info mqttEv[12952]: [AppSrv Mqtt Client] subscribe 8e650d52940381f031f230f6ba6186e1336a3f112765654496b980bab7e31bc0/+/tx - QOS 0
Mon Nov 22 23:52:07 2021 daemon.info mqttEv[12952]: [AppSrv Mqtt Client] subscribe 8e650d52940381f031f230f6ba6186e1336a3f112765654496b980bab7e31bc0/+/tx - QOS 0
Mon Nov 22 23:52:07 2021 daemon.info mqttEv[12952]: [AppSrv Mqtt Client] subscribe api/request - QOS 0
Mon Nov 22 23:52:07 2021 daemon.info appSrv[12952]: [AppSrv Mqtt Client]:subscribe success - mid [1] - qos_count [1] - granted_qos [0]
Mon Nov 22 23:52:08 2021 daemon.info appSrv[12952]: [AppSrv Mqtt Client]:subscribe success - mid [2] - qos_count [1] - granted_qos [0]
Mon Nov 22 23:52:08 2021 daemon.info appSrv[12952]: [AppSrv Mqtt Client]:subscribe success - mid [3] - qos_count [1] - granted_qos [0]