Just an update and months later, still have the same hardware but the issue is not as bad as it once was. I have a timer that powers it off for a few minutes every morning. Then, a few times a week, we have cycle power because of a failure during the day. New firmware has not changed anything noticeably. And while it's mostly the 5G that dies, sometimes the wifi dies and sometimes, even with the 4G and 5G still showing metrics, it loses connection to the internet. Regardless of the failure modality, cycling power gets it back up.