Tcpout Processor: The TCP output processor has paused the data flow. Forwarding to output group {{ redacted }} has been blocked for 30 seconds

I have a new Splunk deployment with a multi-site index cluster. I currently have setup heavy forwarders using indexer discovery and assigning them to the primary site. In my DMC all health checks and index cluster status look good, and we as the index cluster status when looking on the master. In splunkd.log on the index peers and master, I have no errors. I have setup an ssl input on the index cluster and do not have a non-ssl input enabled. I have configured the heavy forwarders output.conf to useSSL. To keep things simple right now, I am not requiring a client cert in the indexer's input.conf. The problem I am seeing is in the heavy forwarder's splunkd.log, and it states: Tcpout Processor: The TCP output processor has paused the data flow. Forwarding to output group {{ redacted }} has been blocked for 30 seconds I have verified connectivity to the master and index peers from the heavy forwarders and have verified connectivity to the input port on the index peers from the heavy forwarders. Any thoughts?