Undertow null pointer exception after changing to random election policy

After changing the singleton subsystem to random election policy getting undertow null pointer exception in logs after clicking deployments->server groups-> "server group name" of HAL management console and it shows zero deployments.

We are having a clustered environment with 3 nodes.

Logs:
ERROR [org.jboss.as.controller.management-operation] (ServerService Thread Pool – 30) WFLYCTL0013: Operation ("read-attribute") failed - address: ([
("deployment" => "masterdata-ei-cvpartner-1.17-SNAPSHOT.war"),
("subsystem" => "undertow")
]): java.lang.NullPointerException

Singleton Setting in domain.xml :
<subsystem xmlns="urn:jboss:domain:singleton:1.0">
<singleton-policies default="default">
<singleton-policy name="default" cache-container="server">
<random-election-policy/>
</singleton-policy>
</singleton-policies>
</subsystem>