QMI bearer: race condition when WDS disconnection indication received during connection attempt

Looks like if we get a WDS indication reporting disconnection during the connection attempt (e.g. in between a successful start network operation and the current settings retrieval), we may end up reporting the modem connected while it isn't in reality:

2019-10-30T00:52:51.629 INFO   daemon ModemManager[4818]: <info>  Simple connect started...
2019-10-30T00:52:51.629 INFO   daemon ModemManager[4818]: <info>  Simple connect state (4/8): Wait to get fully enabled
2019-10-30T00:52:51.629 INFO   daemon ModemManager[4818]: <info>  Simple connect state (5/8): Register
2019-10-30T00:52:51.629 INFO   daemon ModemManager[4818]: <info>  Simple connect state (6/8): Bearer
2019-10-30T00:52:51.629 INFO   daemon ModemManager[4818]: <info>  Simple connect state (7/8): Connect
2019-10-30T00:52:51.629 INFO   daemon ModemManager[4818]: <info>  Modem /org/freedesktop/ModemManager1/Modem/0: state changed (registered -> connecting)
2019-10-30T00:52:52.414 INFO   daemon ModemManager[4818]: <info>  bearer call end reason (1): 'generic-unspecified'
2019-10-30T00:52:52.414 INFO   daemon ModemManager[4818]: <info>  bearer verbose call end reason (3,1028): [cm] (NULL)
2019-10-30T00:52:52.415 INFO   daemon ModemManager[4818]: <info>  Modem /org/freedesktop/ModemManager1/Modem/0: state changed (connecting -> registered)
2019-10-30T00:52:52.606 INFO   daemon ModemManager[4818]: <info>  error: couldn't get current settings: QMI protocol error (15): 'OutOfCall'
2019-10-30T00:52:52.607 INFO   daemon ModemManager[4818]: <info>  Modem /org/freedesktop/ModemManager1/Modem/0: state changed (registered -> connected)
2019-10-30T00:52:52.607 INFO   daemon ModemManager[4818]: <info>  Simple connect state (8/8): All done
2019-10-30T00:52:52.670 WARNIN daemon ModemManager[4818]: <warn>  Reloading stats failed: Couldn't get packet statistics: QMI protocol error (15): 'OutOfCall'