Config Editor do not set cq:lastModified
If you store the configuration via Config-Editor the page only gets a update at jcr:lastModified. If the page is generated in ClassicUI Siteadmin a cq:lastModified is also available in the config page resource and if this is not updated the Siteadmin do not show the modification to the editor.
To be compatible with classic UI I think the cq:lastmodified should be written if the page resource has this property.
We use CA-Config Extension Version 1.0.2
thanks, i've merged it
i will provide a fix