Hello Tom
Below is the contents from openhab.log after rebooting.
2019-12-15 09:23:58.966 [INFO ] [panel.internal.HABPanelDashboardTile] - Started HABPanel at /habpanel
2019-12-15 09:23:59.030 [INFO ] [ebuilder.internal.HomeBuilderServlet] - Started Home Builder at /homebuilder
2019-12-15 09:24:06.912 [INFO ] [el.core.internal.ModelRepositoryImpl] - Loading model āinsteon.itemsā
2019-12-15 09:24:10.639 [INFO ] [thome.model.lsp.internal.ModelServer] - Started Language Server Protocol (LSP) service on port 5007
2019-12-15 09:24:11.187 [INFO ] [el.core.internal.ModelRepositoryImpl] - Loading model āmasterbedroom.sitemapā
2019-12-15 09:24:12.519 [INFO ] [.dashboard.internal.DashboardService] - Started Dashboard at http://xxx.xxx.xxx.xxx:XXXX
2019-12-15 09:24:12.523 [INFO ] [.dashboard.internal.DashboardService] - Started Dashboard at https://xxx.xxx.xxx.xxx:XXXX
2019-12-15 09:24:12.937 [INFO ] [arthome.ui.paper.internal.PaperUIApp] - Started Paper UI at /paperui
2019-12-15 09:24:13.204 [INFO ] [nding.insteonplm.InsteonPLMActivator] - Insteon PLM binding has been started.
2019-12-15 09:24:13.531 [INFO ] [g.insteonplm.InsteonPLMActiveBinding] - refresh interval set to 600s
2019-12-15 09:24:13.533 [INFO ] [g.insteonplm.InsteonPLMActiveBinding] - poll interval set to 300000 per config file
2019-12-15 09:24:13.535 [INFO ] [g.insteonplm.InsteonPLMActiveBinding] - setting modem db retry timeout to 240s
2019-12-15 09:24:13.536 [INFO ] [g.insteonplm.InsteonPLMActiveBinding] - dead device timeout set to 3000s
2019-12-15 09:24:13.540 [INFO ] [g.insteonplm.InsteonPLMActiveBinding] - config: poll_interval -> 300000
2019-12-15 09:24:13.543 [INFO ] [g.insteonplm.InsteonPLMActiveBinding] - config: modem_db_retry_timeout -> 240000
2019-12-15 09:24:13.545 [INFO ] [g.insteonplm.InsteonPLMActiveBinding] - config: port_0 -> /dev/ttyAMA0
2019-12-15 09:24:13.549 [INFO ] [b.core.service.AbstractActiveService] - InsteonPLM has been started
2019-12-15 09:24:13.570 [INFO ] [g.insteonplm.InsteonPLMActiveBinding] - devices: 0 configured, 0 polling, msgs received: 0
2019-12-15 09:24:13.602 [INFO ] [g.insteonplm.InsteonPLMActiveBinding] - config: refresh -> 600000
2019-12-15 09:24:13.604 [INFO ] [g.insteonplm.InsteonPLMActiveBinding] - config: service.pid -> org.openhab.insteonplm
2019-12-15 09:24:13.686 [INFO ] [onplm.internal.driver.SerialIOStream] - successfully opened port /dev/ttyAMA0
2019-12-15 09:24:13.914 [INFO ] [eemulation.internal.ConfigManagement] - Hue Emulation pairing disabled. Service available under /api
2019-12-15 09:24:14.795 [WARN ] [r.internal.EmbeddedBrokerServiceImpl] - Embedded broker offline - Reason unknown
2019-12-15 09:24:14.903 [INFO ] [.transport.mqtt.MqttBrokerConnection] - Starting MQTT broker connection to ā127.0.0.1ā with clientid embedded-mqtt-broker and file store ā/var/lib/openhab2/mqtt/127.0.0.1ā
2019-12-15 09:24:14.952 [WARN ] [mqtt.internal.MqttPersistenceService] - mqtt-persistence:broker
2019-12-15 09:24:14.956 [WARN ] [mqtt.internal.MqttPersistenceService] - mqtt-persistence:topic
2019-12-15 09:24:14.959 [WARN ] [mqtt.internal.MqttPersistenceService] - mqtt-persistence:message
2019-12-15 09:24:15.060 [WARN ] [moquette.spi.impl.SessionsRepository] - Session does not exist. CId=embedded-mqtt-broker
2019-12-15 09:24:15.082 [WARN ] [moquette.spi.impl.SessionsRepository] - Session does not exist. CId=embedded-mqtt-broker
2019-12-15 09:28:13.780 [WARN ] [onplm.internal.device.ModemDBBuilder] - modem database download unsuccessful, restarting!
2019-12-15 09:31:30.634 [INFO ] [g.insteonplm.InsteonPLMActiveBinding] - Item: bedroom got command ON
2019-12-15 09:31:30.651 [INFO ] [onplm.internal.device.CommandHandler] - LightOnOffCommandHandler: sent msg to switch xx.xx.xx to on
2019-12-15 09:31:30.655 [INFO ] [onplm.internal.device.CommandHandler] - Sending message to xx.xx.xx
2019-12-15 09:32:13.784 [WARN ] [onplm.internal.device.ModemDBBuilder] - modem database download unsuccessful, restarting!
2019-12-15 09:32:39.100 [INFO ] [g.insteonplm.InsteonPLMActiveBinding] - Item: bedroom got command OFF
2019-12-15 09:32:39.104 [INFO ] [onplm.internal.device.CommandHandler] - LightOnOffCommandHandler: sent msg to switch xx.xx.xx off
2019-12-15 09:32:39.108 [INFO ] [onplm.internal.device.CommandHandler] - Sending message to xx.xx.xx
2019-12-15 09:33:15.759 [INFO ] [g.insteonplm.InsteonPLMActiveBinding] - Item: bedroom got command ON
2019-12-15 09:33:15.773 [INFO ] [onplm.internal.device.CommandHandler] - LightOnOffCommandHandler: sent msg to switch xx.xx.xx to on
2019-12-15 09:33:15.777 [INFO ] [onplm.internal.device.CommandHandler] - Sending message to xx.xx.xx
2019-12-15 09:34:13.573 [INFO ] [g.insteonplm.InsteonPLMActiveBinding] - devices: 2 configured, 0 polling, msgs received: 0
2019-12-15 09:36:13.790 [WARN ] [onplm.internal.device.ModemDBBuilder] - modem database download unsuccessful, restarting!