Posted from Azure’s status page
Summary of impact: This incident is now mitigated. Between 00:40 UTC on 15 Sep 2020 and 06:06 UTC on 15 Sep 2020, you were identified as a customer using Virtual Machines in UK South who may have experienced connection failures when trying to access some Virtual Machines hosted in the region. These Virtual Machines may have also restarted unexpectedly.
Next steps: Engineers will continue to investigate to establish the full root cause and prevent future occurrences.