To add an example to further my point:
Last night I played from JRemote to a set of grouped Sonos speakers; the speaker, in which my stay-over guest slept, was included in that group (aka Zone, in MR language). When going to bed, I used the on-screen button to end the playback.
This morning then I got up and wanted to let my friend sleep in. So I removed the 'Sonos Guest Room' from the grouped set of speakers and played radio in the kitchen. Unfortunately, this prompted JRiver to resume playback in my friends room, which now, as a stand-alone dlna device, must have signaled something to the MC server to this effect. It made his waking-up a rather unpleasant experience. Luckily he's from the tech industry as well and laughed it off.
This is just one example, in which the unwanted, unexpected automatic resume-play feature of JRemote has been really annoying and awkward.
Thanks to your hint above, Jim, I know what I should have done last night: instead of using the lock-screen way to end playback, I should have opened the phone, re-open or even restart JRemote, click on the small display of the song currently playing, to then find the stop button.
That's really not intuitive though, and it takes way to many steps.
The simple solution is to add a stop button on bottom of screen, as per image.
I am sincerely hoping you consider my request to change the app's behavior