@Bryanp @Kubisuro
We identified a potential intermittent failure on iOS devices and have a hotfix on the way. I’ll update the post when available, but we should have version 3.8.2 released shortly with improvements.
In the meantime Soil Moisture graphs are fully available on the Web platform, and attempts to view on the iOS do work intermittently. Appreciate your patience as we troubleshoot this issue, it’s elusive nature has certainly proved difficult but we hope that this latest release will resolve the problem once and for all.