I've noticed errors in the Chrome console before now about files not found during the loading process, but it's not often that something impacts upon performance or usability. Here though is an example of something that causes a page to fail to complete loading : the wheel in the tab that shows progress in displaying the web page just keeps on spinning and has been doing that for over five minutes.
Two further things that need to be looked into
1 - Search results are displaying with search terms double-displayed (see below)
2 - Starting a new search : the console shows that a POST request was rejected as "Forbidden". What and why?
And, btw, the wait for that cache resource is now showing as over 30 minutes
Keeping an open mind about this anomalous behaviour. Currently investigating whether the Chrome "HTTPS Everywhere" extension is to blame for the "Pending" entries in the Network list that I see here and elsewhere.