This bug existed in Political Machine 2020, but it was quite rare. Essentially, after the election, when you can see the results of the state, it might say "52% D 48% R" but the republicans won the state. Now, this bug happens in every single game, usually 3 or 4 times. Its really annoying.
Note: this is NOT the national popular vote, its the state popular vote that is WRONG (or the candidate who won the state is wrong).