Lofesa commented on issue #1944: XMLHttpRequest got not rewritten URL: https://github.com/apache/incubator-pagespeed-mod/issues/1944#issuecomment-529192399 Hi @MrTschi This page ( https://www.living-zone.de/widgets/emotion/index/emotionId/19/controllerName/index) has 2 cache-control headers, 1 is cache-control: no-cache, private this prevent pagespeed to optimize the page. You need to investigate from where come this header and delete it. I can see some strange behaviour in you web site. In this page I can see a header related to pagespeed ( x-mod-pagespeed: 1.13.35.2-0 ) , this make me think is an apache web server, but in the server header I see nginx..... In the subresources (images,css files...) I can´t see any x-mod-pagespeed header nor x-pagespeed (this one is the header for pagespeed on a nginx server) but have etag header that are set by pagespeed (W/"0"). And last... I get these image rewrited  The question is Have you a nginx cache in front of an apache server? If that is the config then you have to configure a downstream cache ([doc](https://www.modpagespeed.com/doc/downstream-caching))
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