most of the puppet nodes are out of sync in dashboard
Since i upgraded from 1.17.1 to 1.18.0, in the dashboard, most of nodes (about 80%) are reported as out of sync. But they are not.
In the dashboard when i follow the link "out of sync hosts", i arrive on a page with the following search string 
I understand this request as "show me all nodes with reports made during last 5 minutes", it looks a wrong request.
But worst, when i use the query  the result is not the expected one. The two request  and  are with similar results.
 last_report < "5 minutes ago" and status.enabled = true
 last_report > "35 minutes ago" and status.enabled = true