We still have some issues with not being notified of new releases of the HeadTag plugin in the Joomla extension manager. On some sites we have 3.5.6 installed, but there is a newer version 3.5.7. We missed this because there was no notification in the update manager. I checked it there was an 'update site' present and there is. So maybe something is configured wrong in the update XML or the update server?
That should be stabilizing now. Joomla disables update sites that don't respond fast enough. My site is now running on an HA cluster and responds to most requests in less than 1 second. Of course, I'm watching this closely and when I see any slowdowns I will add more worker nodes to the cluster.
I think there still is some (oother) issue. The new version of HeatTag (2.5.9) does not show up in the Joomla extension manager. I checked to see if the update site was there and enabled. It was. When I click on the XML I doe see the latest version in the file. But the extension manager still does not show the update, I tried rebuilding the updates sites, clearing the cache and check for updates again. But nothing...
Anything else when can check to see why this is (not) happening?