This time last week we had jumped from 12 confirmed cases to 15 confirmed cases over the weekend (no deaths, no recoveries). By Friday it was 15 cases and 1 death. Today its 13 cases, 0 deaths, 0 recoveries. I'm guessing maybe they moved a few folks out of the county for treatment elsewhere... but how might we have lost a death?
So I have seen this happen a few different times while I was tracking the data. My best guess is that there was a reporting error. So, either the county or state or hospital mistakenly recorded the death as being a covid death when it was not accurately a covid death or the reporting groups (worldofmeters, john hopkins, etc.) simply keyed in the data incorrectly and it wasn't caught for a few hours. Also, you might have hit on the answer yourself - the death still took place, but the person who died lived in your neighboring county and thus, the death belongs to them instead of your own. This is happening all over the world, so that's why it is a good idea to never take any result as being absolutely accurate down to the digit, but that it is hopefully accurate to within a reasonable margin of error.