Pitching / Batting Stats Mix-up

I've been having issues with `batting_stats` and `pitching_stats` returning unexpected data based on date parameters. Originally, `pybaseball.pitching_stats(2021)` was returning what would be expected from `pybaseball.batting_stats(2021)` (batting stats). This could originally be resolved by instead utilizing `pybaseball.pitching_stats(2020, 2021)` and filtering out 2020.

However, now `pitching_stats` is behaving normally, but `batting_stats` is returning pitching stats for any years beyond 2018. Any ideas why this is happening?