OK, not seeing waveforms in those examples that have obviously had a section of time sliced out like you would get from missing data from a dropout. Instead it's like the signal momentarily goes to zero (hard enough to click) but the time flow is still continuous.
I'd still look for digital clocking mayhem somewhere in the system. Those are still dropouts and digital in origin. If this were interference or static it would be a spike overlaid on the signal. Not little sections of zero.
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