Shopify change history: UPS shipping rates not available at checkout

Some Shopify stores could not display UPS shipping rates at checkout; UPS rates from Shopify Shipping were unaffected. The vendor-rated major outage started at 2019-11-14 06:06 UTC, lasted 22 min, and was resolved at 2019-11-14 06:29 UTC. Shopify recommended adding other carriers’ rates so customers could complete orders; no cause or specific fix was stated.