Did you try Disable SetNext anyway? Also try Ignore Transport Events..
Well that was interesting.
With Disable SetNext and Ignore Transport Events both checked, playback stopped at the end of the album as expected. However, when hovering over the audio path icon, MC reported that it was not using the JRiver audio engine.
With Disable SetNext checked and Ignore Transport Events unchecked, MC reported the audio path (no changes being made), and playback stopped at the end of the album as expected.
With Disable SetNext unchecked and Ignore Transport Events checked, MC reported that it was not using the JRiver audio engine, but playback continued after the last track and did not stop.
Your Media Renderer Analyser reports that SetNextAVTransportURI is supported. I do listen to music that requires gapless playback, so I don't want to disable this just because the recent version of JRiver's Media Center is not working as expected.
Device Description Url
http://192.168.86.31:8080/description.xmlDescription Naim Mu-so Qb all-in-one audio player
Friendly Name Mu-so Qb-839A
Manufacturer Name Naim Audio Ltd.
Manufacturer Url
http://www.naimaudio.comModel Name Mu-so Qb
Model Number 20-004-0024
Model Url
http://192.168.86.31:8080/https://www.naimaudio.com/mu-soPresentation Url
http://192.168.86.31:80/1000/index.htmlSerial Number [removed]
UPnP Device Type urn:schemas-upnp-org:device:MediaRenderer:1
UPnP Media Renderer version 1
Unique Device Name uuid:5F9EC1B3-ED59-79BB-4530-E8C74F06839A
Unique Product Code 123810928305
X_DLNADOC Element
DMR-1.50
Service Url for RenderingControl
http://192.168.86.31:8080/RenderingControl/desc.xmlService Url for ConnectionManager
http://192.168.86.31:8080/ConnectionManager/desc.xmlService Url for AVTransport
http://192.168.86.31:8080/AVTransport/desc.xmlAVT:GetDeviceCapabilities action Supported
AVT:GetMediaInfo action Supported
AVT:GetPositionInfo action Supported
AVT:GetTransportInfo action Supported
AVT:GetTransportSettings action Supported
AVT:SetNextAVTransportURI (gapless play) Supported
AVT:SyncPlay (synchronous play) NOT Supported
RC:GetVolume action Supported
RC:SetVolume action Supported
AVT:Event Subscription Succeeded
RC:Event Subscription Succeeded
HTTP User Agent (client) WinampMPEG/2.8
Play test file result Play success => Start Ok / Stop Ok