My matrix 12 is randomly clicking. Sometimes it happens while playing, sometimes a few seconds after I stop playing. Sometimes it won't happen for hours. I thought I had tracked it down to voices 7 and 8 via the individual outputs, but that may have just been part of the random behavior. 

I tried isolating it via the master outs by deactivating different voices, but it seem to go away most of the time after I muted more than 4 voices, but it didn't seem consistent as to which voices would get rid of it. 

It sounds a lot like the clicking that occurs when you change patches or adjust the panning position. 

Any thoughts on where I should look