I’ve noticed that some apps, like Plex, will not allow the DL4100 (or similar NAS) to go into stand-by.
What’s needed is to be able, using QuickView and also on Android and iOS apps to be able to at least be able to enable and disable apps.
It’s a real inconvenience having to back to something with a web-browser that can handle the Cloud OS3 dashboard to enable to disable apps as needed.