Modem/radio dies when phone goes into sleep

[GaryM0101]

With Android 14 getting the phone to recognize the SIM at boot is challenging. However when it does recognize the SIM the modem stays active as long as the phone doesn't go into sleep mode. Once the phone sleeps the modem dies, the phone still shows the signal bar and the SIM is accessible in the settings, like the modem is still active but it's not. And there is no way I know of how to re-start the radio/modem service in the active interface.

The workaround is to reboot but that only works for the first active session, then it dies again.