With version 3.8.17 I noticed that there seems to be some minor issue in the webUI if in the "This time series"-dialog the "Chart range" is set to be larger or equal to "Last hour" - the stats on the overview are not being refreshed in the selected refresh-interval.
Strangely also normal refreshing via browser is not helping.
Refresh works with "Last minute" and "Last 10 minutes".
Couldn't find any info if this is now a new feature or a bug or if I missed something in changelog.