Resolved
Our Engineers have confirmed that the upstream provider has resolved the issue and this impact end time would be 23:30 UTC on 30-12-2022. This incident has been resolved.
Monitoring
Engineers have confirmed that the DNS propagation delay has recovered since 23:11 UTC and continue to monitor the status.
Investigating
Engineers identified an issue with an upstream DNS provider starting around 12/29/2022 10:14 UTC impacting DNS propagation delays in Common Runtime and Private Spaces. Customers may see delays in any DNS actions and this might include creating/deleting apps or adding/removing custom domains.