Autoconnect fails on WWAN connection after signal lost and restored
Connecting to 4G with a Sierra Wireless MC7430 under CentOS 8 works in general, but NetworkManager can't seem to reactivate the connection after an outage (loss of signal). The issue initially occurred with NM 1.22.8 and MM 1.10.8 but persists under NM 1.32.10 (the latest available for CentOS 8).
The connection profile works for bringing the connection up on boot, as does manually reconnecting with
nmcli con up 4G_network, so I don't think it is a problem with the profile.
It seems like NM never times out when waiting for the activation to occur, and even though it logs the state change of the modem
'connecting' --> 'registered' this also doesn't prompt it to try connecting again. I've attached journalctl_short_clean.log that shows the behaviour.