I am daisy chaining two PGA2310 volume controllers in a balanced preamp design. Every once in a while half of each of the devices goes to maximum gain (all1's). I am pretty certain this is not a software issue. Is there some external occurrence that can reset the gain on half of the device? for example, if the Left output is given a momentary DC voltage or is grounded momentarily, or a momentary drop in supply voltage, etc...