Warnings "sending buffer is full (overloaded network)" in etcd logs on Openshift 4?

Issue

• ETCD logs are showing the following "dropped internal Raft message since sending buffer is full (overloaded network)" warning messages:

  {"level":"warn","ts":"2022-07-07T07:57:00.956Z","caller":"rafthttp/peer.go:267","msg":"dropped internal Raft message since sending buffer is full (overloaded network)","message-  type":"MsgHeartbeat","local-member-id":"12214a3cdf816219","from":"12214a3cdf816219","remote-peer-id":"2a34fb5558fd1f55","remote-peer-name":"pipeline","remote-peer-active":false}