The official explanation is "STOP NOTICING THINGS YOU ANTISEMITES!!!!!"

EDIT: I decided to look into it. Found this from 2020, when exactly the same thing was happening: https://www.reuters.com/article/uk-factcheck-wi-pa-mi-vote-spikes-idUSKBN27Q307

So the official claim, particularly when there's a giant spike that gets reversed, is "It's just a clerical error! It's totally normal, don't you dare suggest it's not!" And also "they suddenly released a bunch of mail-in votes and those are overwhelmingly Democrat!"

The official explanation is "STOP NOTICING THINGS YOU ANTISEMITES!!!!!"

EDIT: I decided to look into it. Found this from 2020, when exactly the same thing was happening: https://www.reuters.com/article/uk-factcheck-wi-pa-mi-vote-spikes-idUSKBN27Q307

So the official claim is "It's just a clerical error! It's totally normal, don't you dare suggest it's not!"

The official explanation is "STOP NOTICING THINGS YOU ANTISEMITES!!!!!"