I've noticed since updating to 3.08.3 and 3.08.4 for OSX , i've been getting the error stated as above.
On the Netcast LG TV, it'll pop up with Device Disconnected Error meanwhile on my WebOS 2.0 LG TV it'll pop up with "Unstable Network". It seems with every forward updates the support for DLNA playback especially on the older LG Netcast TV's is getting worst and unstable.
The older issue I had was with accessing the DLNA folders. Whenever i'm trying to access "Latest" it crashes the TV, this happens to any Emby media library that has more content, >100 media files. Those with very little content seems not to have this problem. The one way i could access my media files was to use the "Genre" folders to browse which is less than convenient option. This problem existed since before 3.06.4
This seems to start to affect playback experience on my WebOS 2 TV as well.
This error cannot be due to my home network issues as the TV and Server is hooked up via gigabit lan cables.
Do have a look at the attached logs to see if it sheds any light on the issue.
I have reverted back to 3.06.4 which gives me no problems as above.