Simple idx.array immutability

Author: ivirshup

pandas/core/indexes/base.py

@@ -3860,7 +3860,7 @@ def array(self) -> ExtensionArray:
         if isinstance(array, np.ndarray):
             from pandas.core.arrays.numpy_ import PandasArray
 
-            array = PandasArray(array)
+            array = PandasArray(self.values)
         return array
 
     @property