Bug on scan.nextcloud.com?

I scanned my cloud again in scan.nextcloud.com

But i get an A+ Rating. The site tells me that the latest version is not installed.
when I look at the scan Date it’s scanned on 2017-07-22. Is that an Bug?

Here the same: First scan brings “old version” and after a rescan the real version.

Assumption of me: The scan since always only the old results. Only when one scans again, he indicates the new result.

Sorry for my bad English…