Unable to play unknown soundEvent: minecraft:none

"Game Output" log from launcher:

[21:47:49] [Client thread/WARN]: Unable to play unknown soundEvent: minecraft:none
Exception in thread "Thread-7" java.lang.NullPointerException
at paulscode.sound.codecs.CodecJOrbis.readBytes(CodecJOrbis.java:559)
at paulscode.sound.codecs.CodecJOrbis.read(CodecJOrbis.java:356)
at paulscode.sound.Source.stream(Source.java:953)
at paulscode.sound.StreamThread.run(StreamThread.java:129)