Shopify change history: Assets not loading for some Shopify services

Shopify reported a critical outage affecting CDN assets and access to Admin, Checkout and Storefront services for some merchants and customers. It started at 2021-06-08 10:24 UTC and was resolved at 2021-06-08 11:20 UTC, lasting 55 min; Shopify identified the problem but did not state a cause or specific fix.