Hi,
This is just the client crash (server detected the client is not running anymore and also stopped).
I'm quite sure this is just a memory leak at the NVorbis plugin we're using for music decoding/streaming. Will check for the next VE patch. With the last patch we didn't check the game stability after many hours in idle and nobody reported this issue before (most players run it just for a few hours max).
Thanks for reporting!
Regards!