/server-group=<group>/jvm=<jvm>:add() ignores properties

[INFO] {
[INFO] "operation" => "add",
[INFO] "address" => [
[INFO] ("server-group" => "my-group"),
[INFO] ("jvm" => "default")
[INFO] ],
[INFO] "jvm" => ("default" =>

{ [INFO] "heap-size" => "64m", [INFO] "max-heap-size" => "128m" [INFO] }

)
[INFO] }

leads to

[localhost:9999 /] /server-group=my-group:read-resource(recursive=true)
{
"outcome" => "success",
"result" => {
"profile" => "default",
"jvm" => {"default" => {
"type" => undefined,
"agent-lib" => undefined,
"agent-path" => undefined,
"debug-enabled" => undefined,
"debug-options" => undefined,
"env-classpath-ignored" => undefined,
"environment-variables" => undefined,
"heap-size" => undefined,
"max-heap-size" => undefined,
"java-agent" => undefined,
"java-home" => undefined,
"jvm-options" => undefined,
"permgen-size" => undefined,
"max-permgen-size" => undefined,
"stack-size" => undefined
}},
"deployment" => undefined,
"socket-binding-group" => "standard-sockets"
},
"compensating-operation" => undefined
}