#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
@Override
        public ClusterState getLastAcceptedState() {
            return delegate.getLastAcceptedState();
        }
        @Override
        public void setCurrentTerm(long currentTerm) {
            possiblyFail("before writing term of " + currentTerm);
            delegate.setCurrentTerm(currentTerm);
        }
        @Override
        public void setLastAcceptedState(ClusterState clusterState) {
            possiblyFail("before writing last-accepted state of term=" + clusterState.term() + ", version=" + clusterState.version());
            delegate.setLastAcceptedState(clusterState);
        }
        @Override
        public void close() {
            assertTrue(openPersistedStates.remove(this));
            try {
                delegate.close();
            } catch (IOException e) {
                throw new AssertionError("unexpected", e);
            }
        }
        @Override
        public String toString() {
            return "MockPersistedState[" + localNode.descriptionWithoutAttributes() + "]";
        }
    }
}