This incident has been resolved.

We are working on upgrading stellar infrastructure due to https://stellar.org/developers-blog/protocol-16-upgrade-guide, as a result you may see intermittent issues in transactions getting processed with delay.

The Stellar Development Foundation has provided an upgrade to solve recent issues (Stellar Core v.16.0.0). We are currently looking into the specifics and will post updates as we make the upgrade.

You can find more information here: https://stellar.org/developers-blog/protocol-16-upgrade-guide