Didn't get an answer to this in the media network forum, so I'm trying here.
In 2017, Bob stated in a post:
We are currently working on a new feature to allow a playlist to be sent as a stream to the device. It will solve the gapless playback for DLNA renderers that support playing of streams with some limitations (no track metadata, limited output format selection).
https://yabb.jriver.com/interact/index.php?topic=109828.0Was this done? If so, how do I turn the feature on?