When you use other earthbending abilities (RaiseEarth for example) do you hear anything?
Also, are you using PK 1.6.0 Beta 7 or newer?
im useing pk beta 8 and raise earth/collapse doesnt make noise either, also when i have earthshard bound and someone hits me with smokescreen my bending is completely gone i had to relog re-choose and rebind
update:now my bending just keeps geting removed...
im also seeing this in my console
11.01 12:37:34 [Server] INFO at ca.carbogen.korra.earthshard.EarthShardListener$1.run(EarthShardListener.java:86) ~[?:?]
11.01 12:37:34 [Server] INFO at ca.carbogen.korra.earthshard.EarthShard.progress(EarthShard.java:99) ~[?:?]
11.01 12:37:34 [Server] INFO java.lang.NullPointerException
11.01 12:37:34 [Server] WARN Task #5429 for ProjectKorra v1.6.0 BETA 8 generated an exception
yet another update: i fixed somkescreen taking the bending im thinking it fixed its self with the restart