JGroups transport type can't be set

I'm trying to set transport type for JGroups UDP transport. After successful setting via CLI (or model node) and reload, this value is reverted back to undefined.

[standalone@localhost:9990 transport=UDP] :write-attribute(name="type" ,value="TUNNEL")
{
"outcome" => "success",
"response-headers" =>

{ "operation-requires-reload" => true, "process-state" => "reload-required" }

}

[standalone@localhost:9990 transport=UDP] ls
property diagnostics-socket-binding=undefined oob-executor=undefined shared=false thread-factory=undefined
thread-pool machine=undefined properties=[] site=undefined timer-executor=undefined
default-executor=undefined module=org.jgroups rack=undefined socket-binding=jgroups-udp type=undefined