Was able to reproduce this and cath it with profiler - here's what I got:
Timestamp Type Description Object Name Game Object Name Object ID Game Object ID Scope
0:34:33.376 Error ACP ERROR, not all flowgraph returned. Global Global
0:34:33.376 Error ACP ERROR, WaitForCommandCompletion did not receive all messages Global Global
0:34:33.386 Error ACP ERROR, not all flowgraph returned. Global Global
0:34:33.386 Error ACP ERROR, WaitForCommandCompletion did not receive all messages Global Global
0:34:33.397 Error ACP ERROR, not all flowgraph returned. Global Global
0:34:33.397 Error ACP ERROR, WaitForCommandCompletion did not receive all messages Global Global
0:34:33.408 Error ACP ERROR, not all flowgraph returned. Global Global
0:34:33.408 Error XMA Fatal Error. Audible glitch possible. Global Global
0:34:33.408 Error XMA Fatal Error. Audible glitch possible. Global Global
0:34:33.408 Error XMA Fatal Error. Audible glitch possible. Global Global
0:34:33.408 Error XMA Fatal Error. Audible glitch possible. Global Global
0:34:33.418 Error XMA Fatal Error. Audible glitch possible. Global Global