Weird website browsing problem

I have a really weird problem with the website Arstechnica.

On my iPhone, iMac or iPad (so both iOS and OS X) every time I navigate to Arstechnica.com for the first time in a little while I have to load the site twice. It starts to load and then freezes with nothing on screen, if I load it again it pops up fine. This happens if I am navigating there from Feedly, a bookmark or typing the address into my browser.

This keeps reoccurring but I haven't observed a fixed length of time between faults. Perhaps it's somehow related to a cache?

I have only witnessed this on Arstechnica.

So I don't know if the fault lies with my devices, router, ISP or Arstechnica. Nor do I have any idea how to begin diagnosing the fault. Can you help?

 

Just a follow up. This has resolved itself without me changing anything.

I can only guess that it was a screw up with routing on my ISP's end (Virgin Media).