ModemManager tries to get extended signal info from modem object that has already been destroyed

This issue happens when the "WITH_SUSPEND_RESUME" mechanism is enabled. And There are couple of suspend/resume cycles has been performed. issue-log.txt

//ModemManager still tries to load extended signal info after the old modem objects have already been destroyed.

2022-05-25T22:44:32.923197Z WARNING ModemManager[2404]: <warn>  [modem0] couldn't reload extended signal information: Couldn't peek MBIM port
2022-05-25T22:44:32.923246Z WARNING ModemManager[2404]: <warn>  [modem1] couldn't reload extended signal information: Couldn't peek MBIM port
2022-05-25T22:44:32.923337Z WARNING ModemManager[2404]: <warn>  [modem3] couldn't reload extended signal information: Couldn't peek MBIM port
2022-05-25T22:44:33.923657Z WARNING ModemManager[2404]: <warn>  [modem5] couldn't reload extended signal information: Couldn't peek MBIM port
2022-05-25T22:44:35.924111Z WARNING ModemManager[2404]: <warn>  [modem4] couldn't reload extended signal information: Couldn't peek MBIM port
2022-05-25T22:44:36.922734Z WARNING ModemManager[2404]: <warn>  [modem2] couldn't reload extended signal information: Couldn't peek MBIM port

//ModemManager is aware of that the old modem object has been destroyed

//modem object are destroyed and recreated during suspend and resume (expected behavior)
2022-05-25T22:38:50.982427Z DEBUG ModemManager[2404]: <debug> [device /sys/devices/pci0000:00/0000:00:1c.0/0000:57:00.0] unexported modem from path '/org/freedesktop/ModemManager1/Modem/0'
2022-05-25T22:39:00.274768Z DEBUG ModemManager[2404]: <debug> [device /sys/devices/pci0000:00/0000:00:1c.0/0000:57:00.0]  exported modem at path '/org/freedesktop/ModemManager1/Modem/1'
2022-05-25T22:39:03.930708Z DEBUG ModemManager[2404]: <debug> [device /sys/devices/pci0000:00/0000:00:1c.0/0000:57:00.0] unexported modem from path '/org/freedesktop/ModemManager1/Modem/1'
2022-05-25T22:39:39.308054Z DEBUG ModemManager[2404]: <debug> [device /sys/devices/pci0000:00/0000:00:1c.0/0000:57:00.0]  exported modem at path '/org/freedesktop/ModemManager1/Modem/2'
2022-05-25T22:39:46.980873Z DEBUG ModemManager[2404]: <debug> [device /sys/devices/pci0000:00/0000:00:1c.0/0000:57:00.0] unexported modem from path '/org/freedesktop/ModemManager1/Modem/2'
2022-05-25T22:40:00.326850Z DEBUG ModemManager[2404]: <debug> [device /sys/devices/pci0000:00/0000:00:1c.0/0000:57:00.0]  exported modem at path '/org/freedesktop/ModemManager1/Modem/3'
2022-05-25T22:40:07.938576Z DEBUG ModemManager[2404]: <debug> [device /sys/devices/pci0000:00/0000:00:1c.0/0000:57:00.0] unexported modem from path '/org/freedesktop/ModemManager1/Modem/3'
2022-05-25T22:40:45.292805Z DEBUG ModemManager[2404]: <debug> [device /sys/devices/pci0000:00/0000:00:1c.0/0000:57:00.0]  exported modem at path '/org/freedesktop/ModemManager1/Modem/4'
2022-05-25T22:40:49.922173Z DEBUG ModemManager[2404]: <debug> [device /sys/devices/pci0000:00/0000:00:1c.0/0000:57:00.0] unexported modem from path '/org/freedesktop/ModemManager1/Modem/4'
2022-05-25T22:41:03.257258Z DEBUG ModemManager[2404]: <debug> [device /sys/devices/pci0000:00/0000:00:1c.0/0000:57:00.0]  exported modem at path '/org/freedesktop/ModemManager1/Modem/5'
2022-05-25T22:41:09.969025Z DEBUG ModemManager[2404]: <debug> [device /sys/devices/pci0000:00/0000:00:1c.0/0000:57:00.0] unexported modem from path '/org/freedesktop/ModemManager1/Modem/5'
2022-05-25T22:41:37.887706Z DEBUG ModemManager[2404]: <debug> [device /sys/devices/pci0000:00/0000:00:1c.0/0000:57:00.0]  exported modem at path '/org/freedesktop/ModemManager1/Modem/6'