Yeah I just pulled up the 12/2 event where it was raining hard there and we don't really see anything similar. Blockage/trees aren't going away obv. In that event I do see very faint hints of filtering near the radar (very low levels) along the isodop and the clutter removal may be 'tricked' by strong signal but velocity near zero...
Today's event has much less signal especially near the ground. The low level winds are basically nil, metar at KTAN reporting calm so velocity is again near zero even though it's not associated with the isodop this time. My guess is it's still thinking clutter in certain areas, or in this case maybe some other kind of false signal... But it is definitely a filter of some kind not blockage.