4.10.1,
tested and confirmed with clementine, and amarok
tested and works fine with chromium and rhythmbox
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scenario:
Launching music player
Selecting a DLNA server (a set top box) as output for this application on pulseaudio (pavucontrol for instance, application tab)
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What happens:
After a normal litle gap, we can hear the music normally for half a second, then it's muted (not on mixer, just on output) after 1 second
tcpdump showed me there are gcommunication event when muted : and music is not pause, just it continues, but no sounds
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Workaround :
play music with rhythmbox 3.4.2
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I wonder where to snip good logs to troubleshoot more

No errors found on journalctl : just not related with the output :

juin 26 00:05:27 pc tracker-extract[12177]: Could not insert metadata for item "$PATH/Duke%20Ellington%20[...]%20Clementine.mp3": Unable to insert multiple values for subject `urn:uuid:700a1f29-3fda-283b-077a-778f28dbafa1' and single valued property `dc:publisher' (old_value: '135319', new value: 'urn:contact:Storyville%20Records')

I have my music on btrfs but same issue on ext4 fs

i removed .cache , but issue persists