#98420 verifies that the election scheduler is not running when a cluster is stable, but this assertion does not hold in the `AtomicRegisterCoordinatorTests` suite. This issue tracks the work to investigate and fix up the problem.
test/framework/src/main/java/org/elasticsearch/cluster/coordination/AbstractCoordinatorTestCase.java
equalTo(false)
                    );
                    assertTrue(
                        nodeId + " has locked into the cluster",
                        clusterNode.getLastAppliedClusterState().metadata().clusterUUIDCommitted()
                    );
                    assertThat(
                        nodeId + " has the correct cluster UUID",
                        clusterNode.getLastAppliedClusterState().metadata().clusterUUID(),
                        equalTo(clusterUuid)
                    );
                    for (final ClusterNode otherNode : clusterNodes) {
                        if (isConnectedPair(leader, otherNode) && isConnectedPair(otherNode, clusterNode)) {
                            assertTrue(
                                otherNode.getId() + " is connected to healthy node " + clusterNode.getId(),
                                otherNode.transportService.nodeConnected(clusterNode.localNode)
                            );
                        }
                    }
                } else {
                    assertThat(nodeId + " is not following " + leaderId, clusterNode.coordinator.getMode(), is(CANDIDATE));
                    assertThat(nodeId + " has no master", clusterNode.getLastAppliedClusterState().nodes().getMasterNode(), nullValue());
                    assertThat(
                        nodeId + " has NO_MASTER_BLOCK",
                        clusterNode.getLastAppliedClusterState().blocks().hasGlobalBlockWithId(NO_MASTER_BLOCK_ID),
                        equalTo(true)
                    );
                    assertFalse(
                        nodeId + " is not in the applied state on " + leaderId,
                        leader.getLastAppliedClusterState().getNodes().nodeExists(nodeId)