Running 861 with DSP6000 (mains), 96/24 DSP5000 (Center) and 96/24 DSP5000's for rears. For some reason, when I either stop or change a movie, when the 861 locks onto a signal, I get a loud burst of white noise from (only) the rear speakers for a second or two (it's actually pretty jarring).

Any ideas what may be causing this?

861v4, DSP6000 (24/96), DSP5000C (24/96), Ensemble (1TB)