For long range sensor tags, if auto-update interval is set to be 5 minutes or longer, you may receive false out-of-range notifications followed by re-established link notification. This problem is caused by each tag sending updates at an longer interval of about 1.5x the configured interval. We have fixed this problem from the server side. To apply the fix to your set up, please from Web App, click Settings->Wireless... and change to some different frequency, and click Migrate. For tags that did not respond, a yellow "Migrate Settings" button will show up, click it to retry migration. We apologize for the inconvenience.