Inconsistent results in JBoss CLI web subsystem

Issue

After adding a log pattern

/profile=ha/subsystem=web/virtual-server=default-host/access-log=configuration:add(pattern="%T %h %l %u %t %r %s %b %{COOKIE}i %{SET-COOKIE}o") 

I get the following output for read-resource

    "outcome" => "success",
    "result" => {
        "alias" => [
            "localhost",
            "example.com"
        ],
        "default-web-module" => "ROOT.war",
        "enable-welcome-root" => true,
        "name" => "default-host",
        "access-log" => {"configuration" => undefined},
        "configuration" => {"access-log" => undefined},
        "rewrite" => undefined,
        "sso" => {"configuration" => undefined}

When trying to get into a configuration node (configuration directory for sso or access-log) using the JBoss CLI, I get the following error even though the node exists
It would appear the access-log configuration is affecting the sso parameter when it shouldn't

JBAS014808: Child resource '"...." => "configuration"' not found

Without access-log configuration, the output from /profile=ha/subsystem=web/virtual-server=default-host:read-resource is

    "outcome" => "success",
    "result" => {
        "alias" => [
            "localhost",
            "example.com"
        ],
        "default-web-module" => "ROOT.war",
        "enable-welcome-root" => true,
        "name" => "default-host",
        "access-log" => undefined,
        "configuration" => undefined,
        "rewrite" => undefined,
        "sso" => undefined
    }