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Modem randomly fails registering

I'm using version 1.20.0, and my modem sometimes fails to register. The modem is:

Bus 002 Device 015: ID 1199:9013 Sierra Wireless, Inc. Sierra Wireless Gobi 3000 Modem device (MC8355)

The log when it registers successfully is:

ModemManager[76889]: <info>  [device /sys/devices/pci0000:00/0000:00:14.0/usb2/2-4] creating modem with plugin 'sierra' and '5' ports
ModemManager[76889]: <warn>  [plugin/sierra] could not grab port ttyUSB2: Cannot add port 'tty/ttyUSB2', unhandled port type
ModemManager[76889]: <info>  [base-manager] modem for device '/sys/devices/pci0000:00/0000:00:14.0/usb2/2-4' successfully created
ModemManager[76889]: <warn>  [modem0/cdc-wdm0/qmi] Couldn't setup data format: Service 'wda' not supported by the device
ModemManager[76889]: <warn>  [modem0] couldn't load carrier config: QMI PDC not supported
ModemManager[76889]: <warn>  [modem0] couldn't query SIM slots: QMI protocol error (71): 'InvalidQmiCommand'
ModemManager[76889]: <warn>  [modem0/sim0] couldn't load list of emergency numbers: Failed to parse CRSM query result '+CRSM: 105,129,""'
ModemManager[76889]: <warn>  [modem0/sim0] couldn't load GID2: Couldn't read data from UIM: QMI protocol error (3): 'Internal'
ModemManager[76889]: <warn>  [modem0] couldn't load UE mode of operation for EPS: Unknown error
ModemManager[76889]: <warn>  [modem0] couldn't load initial EPS bearer settings: Couldn't get LTE attach PDN list: QMI protocol error (71): 'InvalidQmiCommand'
ModemManager[76889]: <info>  [modem0] state changed (unknown -> disabled)
NetworkManager[486]: <info>  [1669361303.2397] manager: (cdc-wdm0): new Broadband device (/org/freedesktop/NetworkManager/Devices/42)
NetworkManager[486]: <info>  [1669361303.2402] device (cdc-wdm0): state change: unmanaged -> unavailable (reason 'managed', sys-iface-state: 'external')
NetworkManager[486]: <info>  [1669361303.2406] device (cdc-wdm0): modem state 'enabling'
NetworkManager[486]: <info>  [1669361303.2409] device (cdc-wdm0): state change: unavailable -> disconnected (reason 'none', sys-iface-state: 'managed')
ModemManager[76889]: <info>  [modem0] state changed (disabled -> enabling)
ModemManager[76889]: <info>  [modem0] power state updated: on
ModemManager[76889]: <info>  [modem0] state changed (enabling -> enabled)
ModemManager[76889]: <info>  [modem0] 3GPP registration state changed (unknown -> registering)
ModemManager[76889]: <info>  [modem0] 3GPP registration state changed (registering -> roaming)
ModemManager[76889]: <info>  [modem0] state changed (enabled -> registered)

and when it fails:

ModemManager[76278]: <info>  [device /sys/devices/pci0000:00/0000:00:14.0/usb2/2-4] creating modem with plugin 'sierra' and '5' ports
ModemManager[76278]: <warn>  [plugin/sierra] could not grab port ttyUSB2: Cannot add port 'tty/ttyUSB2', unhandled port type
ModemManager[76278]: <info>  [base-manager] modem for device '/sys/devices/pci0000:00/0000:00:14.0/usb2/2-4' successfully created
ModemManager[76278]: <warn>  [modem1/cdc-wdm0/qmi] Couldn't setup data format: Service 'wda' not supported by the device
ModemManager[76278]: <warn>  [modem1] couldn't load carrier config: QMI PDC not supported
ModemManager[76278]: <warn>  [modem1] couldn't query SIM slots: QMI protocol error (71): 'InvalidQmiCommand'
ModemManager[76278]: <warn>  [modem1/sim1] couldn't load list of emergency numbers: Failed to parse CRSM query result '+CRSM: 105,129,""'
ModemManager[76278]: <warn>  [modem1/sim1] couldn't load GID2: Couldn't read data from UIM: QMI protocol error (3): 'Internal'
ModemManager[76278]: <warn>  [modem1] couldn't load UE mode of operation for EPS: Unknown error
ModemManager[76278]: <warn>  [modem1] couldn't load initial EPS bearer settings: Couldn't get LTE attach PDN list: QMI protocol error (71): 'InvalidQmiCommand'
ModemManager[76278]: <info>  [modem1] state changed (unknown -> disabled)
NetworkManager[486]: <info>  [1669360786.4651] manager: (cdc-wdm0): new Broadband device (/org/freedesktop/NetworkManager/Devices/41)
NetworkManager[486]: <info>  [1669360786.4655] device (cdc-wdm0): state change: unmanaged -> unavailable (reason 'managed', sys-iface-state: 'external')
NetworkManager[486]: <info>  [1669360786.4659] device (cdc-wdm0): modem state 'enabling'
NetworkManager[486]: <info>  [1669360786.4662] device (cdc-wdm0): state change: unavailable -> disconnected (reason 'none', sys-iface-state: 'managed')
ModemManager[76278]: <info>  [modem1] state changed (disabled -> enabling)
ModemManager[76278]: <info>  [modem1] power state updated: on
ModemManager[76278]: <info>  [modem1] state changed (enabling -> enabled)
ModemManager[76278]: <warn>  [modem1] initial 3GPP registration check failed: Couldn't get serving system: QMI protocol error (74): 'InformationUnavailable'

Please let me know if you need more information.

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