Do not display input field in MultiSchemaField.tsx with null type (#4541)

Co-authored-by: Heath C <51679588+heath-freenome@users.noreply.github.com>

Author: v1ack

CHANGELOG.md

@@ -26,6 +26,10 @@ should change the heading of the (upcoming) version to include a major version b
 
 - Restricted the chakra-react-select peerDependency to <6.0.0, fixing [#4539](https://github.com/rjsf-team/react-jsonschema-form/issues/4539)
 
+## @rjsf/core
+
+- Do not display input field in MultiSchemaField with null type
+
 ## @rjsf/mui
 
 - Fixed issue in BaseInputTemplate where input props were passed to `slotProps.htmlInput`, which does not work in MUI v5.

packages/core/src/components/fields/MultiSchemaField.tsx

@@ -241,7 +241,9 @@ class AnyOfField<T = any, S extends StrictRJSFSchema = RJSFSchema, F extends For
             readonly={readonly}
           />
         </div>
-        {optionSchema && <_SchemaField {...this.props} schema={optionSchema} uiSchema={optionUiSchema} />}
+        {optionSchema && optionSchema.type !== 'null' && (
+          <_SchemaField {...this.props} schema={optionSchema} uiSchema={optionUiSchema} />
+        )}
       </div>
     );
   }