As others have noted, timing of overnight tally of almost 170K city MKE votes was entirely expected and forewarned. And rather than being "strange," the lopsided Biden tally gave him almost exactly the same final vote margin (59 points) in the city of MKE that Clinton got in 2016
Look at this in Wisconsin! A day AFTER the election, Biden receives a dump of 143,379 votes at 3:42AM, when they learned he was losing badly. This is unbelievable!