Maintenance on foundationdb nodes

I would like to put the fdb node in maintenance mode, have executed below two test cases on fdb cluster.

TestCase 1:
Kept one foundationdb node in maintenace mode
To find out which node is in maintenance mode, verified the output of “status json” file. Noticed maintenance_zone attribute with the single ip.

TestCase 2:
Kept two foundationdb nodes in maintenace mode
To find out which node is in maintenance mode, verified the output of “status json” file. Noticed maintenance_zone attribute with single ip(ip was overridden with latest maintenance node ip)

In the testcase(2), why the maintenance_zone attribute is not showing multiple ip addresses? I’m in dilemma that is both the fdb nodes in maintenance mode or not?

Please confirm on this.