All my devices are running the latest versions. I can sync on my Mac but not on my iPhone. I've reset iCloud on my iPhone to no avail. To remedy this I'm now syncing over Wi-Fi which is not ideal.
1Password Version: Not ProvidedExtension Version: Not ProvidedOS Version: iOSSync Type: iCloudReferrer: kb:icloud-troubleshooting, kb:diagnostics, kb:icloud-faq
I get the "Looking up iCloud information" message. It gets stuck there. I've uninstalled app, restarted device, stopped and restarted iCloud on my entire device.
I'm sorry for the trouble. This is a known issue at the moment. You can find the latest status here.