listed bugfix

Author: DataInformer

doc/source/whatsnew/v1.1.0.rst

@@ -921,6 +921,7 @@ Numeric
 - Bug in :meth:`DataFrame.diff` with ``axis=1`` returning incorrect results with mixed dtypes (:issue:`32995`)
 - Bug in :meth:`DataFrame.corr` and :meth:`DataFrame.cov` raising when handling nullable integer columns with ``pandas.NA`` (:issue:`33803`)
 - Bug in :class:`DataFrame` and :class:`Series` addition and subtraction between object-dtype objects and ``datetime64`` dtype objects (:issue:`33824`)
+- Bug in :meth:`Series.value_counts` with ``normalize=True`` for NA values (:issue:`25970`)
 
 Conversion
 ^^^^^^^^^^