18.104.22.168 release notes
Post date: Jul 12, 2020 4:3:16 PM
Issue 1669 - The Salesforce Summer '20 release seems to have made a change in how API calls are handled in orgs with My Domain enabled. Now an HTTP 307/Temporary Redirect is issued which IC (and evidently many other API clients) did not follow. Now all SOAP and REST API calls should correctly follow redirects when issued.