From my experience every tuner performs differently. In fact, tuners that come off the same manufacturing line can even perform differently. If it is a glitch all you can do is wait and hope for an update, but in the mean time I would check to see if the signal strenght is an issue. What does the meter read for your off-air reception the receiver? I know this isnt very accurate, more of a data quality meter, but if it reads near 100% and you still get the "blink" you may want to to try an adjustable attennuator. Some tuners have varying thresholds of too much or too little signal.
-Mike
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