Automated checks for MCS started failing in both DCs on 2017-10-23 18:21Z:
/{domain}/v1/page/mobile-sections-lead/{title} (retrieve lead section of en.wp Altrincham page via mobile-sections-lead) is CRITICAL: Test retrieve lead section of en.wp Altrincham page via mobile-sections-lead responds with malformed body (AttributeError: 'NoneType' object has no attribute 'get')
The response for the test page does not contain the pronunciation field. No MCS deployments happened, nor has the page been edited.