Shopify change history: Storefront and checkout down for some shops

Shopify reported a major outage affecting Storefront and Checkout for some shops, starting 2019-11-05 16:51 UTC and resolved at 2019-11-05 19:02 UTC, lasting 2 h 10 min. A fix was implemented by 2019-11-05 17:34 UTC; no cause was stated.