Why is the response time of shopify's CDN so incredibly high?

[Tryhard]

In the following image you will see shopify's CDN known as "imagery" taking up to 1.8s to return a 50x50px cached image. Yes an already cached, miniscule 2.3KB image is takin almost 2 seconds waiting for server response from shopify's CDN. The results are consistent. 

How is this possible and why is nobody talking about it? What am I missing here? 

[Amiran]

Hey! Could you resolve the issue with "Waiting for server response"?  

I'm facing same issue but with crushing 7.38s