Thanks, that sounds like a very likely candidate.
You’re correct, of course, that there does not seem to be a 1.3.0 release on the GitHub site, but based on some previous advice we were using WorkBench, and there is indeed a 1.3.0-rc.1 target there.
We’re most of the way through some 1.5 changes in any case. Only remaining issue is that getting the network operator name does not seem to work anymore via the:
Cellular.command(callbackOperator, operator_name, DEFAULT_TIMEOUT, “AT+UDOPN=9\r\n”))
approach. Since the name of the network operator does not seem to be possible even in principal on LTE cards (?), we may need to rethink some logic on our end. Not entirely clear that 1.2.1 would solve that anyway.
For completeness, we may try the SoftDevice downgrade just to see if we can resolve that that was indeed the issue. Will update here if we do.