I was alerted the other day that iCloud hadn't been backed up in two weeks. I was able to force a backup without a problem. All of the settings are correct, I have ample space, but I have not had an automatic backup going forward. I've reset Network Settings, rebooted our router and modem all to no avail. I've even attempted a backup while not on my home wifi. The only system change I can recall is I updated to 11.3.1 when it first appeared. Any suggestions?