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Level 7

Live TV jumps from four bars of signal to one bar for no apparent reason.

After recent update to add streaming channels to the Live TV guide, OTA channels are increasingly showing signal strength dropping to one bar an showing the channel banner below then back to four bars.  This type of activity has not been seen prior to the latest update.  I have an Sharp LC-24LB601U with a single OTA flat antenna.  Software version is 940 build 4200-69.  I have rescanned channels.