Can you try enabling the 'debug' filter and looking at the HTML again? That filter annotates some of the decisions mod_pagespeed by injecting HTML comments.
One thing that can block combination is media tags, though I didn't see any in the fragments you pasted. [ Full content available at: https://github.com/apache/incubator-pagespeed-mod/issues/1799 ] This message was relayed via gitbox.apache.org for [email protected]
