This more a problem than a bug.
When [NOAA] Hi Res data is update, the prior data is lost.
As temporal accuracy is suspect at the best of times, when there are intense spikes of precipitation, it helps to see the past data to determine if the coming prediction is gospel or garbage.
Today the same pattern just keeps getting shifted a bit later and I’ve already gotten soaked twice strutting the mutt.
BUT I love the app!