When Action is invoked through RESTCONF, it will provide wrong DOMDataTreeIdentifier path for specific Action. This path will point to the parent of called Action.

https://github.com/opendaylight/mdsal/blob/master/dom/mdsal-dom-broker/src/main/java/org/opendaylight/mdsal/dom/broker/DOMRpcRouter.java#L546
entry.getImplementations(path).get(0).invokeAction(type, path, input)

path = DOMDataTreeIdentifier{datastore=OPERATIONAL, root=/(instance:identifier:module?revision=2014-01-17)cont/cont1}

Registered implementation key is:
DOMDataTreeIdentifier{datastore=OPERATIONAL, root=/(instance:identifier:module?revision=2014-01-17)cont/cont1/reset}