Apple AUGraphicEQ dead-lock

Hi,

I encounter a dead-lock with Apple AUGraphicEQ. I have attached backtrace:

  thread #44, name = 'com.apple.audio.toolbox.AUScheduledParameterRefresher'
    frame #0: 0x0000000182059bb0 libsystem_kernel.dylib`semaphore_wait_trap + 8
    frame #1: 0x000000018e9e7e00 caulk`caulk::semaphore::timed_wait(double) + 224
    frame #2: 0x000000018e9e7cac caulk`caulk::concurrent::details::worker_thread::run() + 32
    frame #3: 0x000000018e9e794c caulk`void* caulk::thread_proxy<std::__1::tuple<caulk::thread::attributes, void (caulk::concurrent::details::worker_thread::*)(), std::__1::tuple<caulk::concurrent::details::worker_thread*>>>(void*) + 96
    frame #4: 0x000000018209dc58 libsystem_pthread.dylib`_pthread_start + 136

regards, Joël