[useAutocomplete] Pass only valid values for the getOptionLabel prop

packages/mui-base/src/AutocompleteUnstyled/useAutocomplete.js

@@ -465,14 +465,20 @@ export default function useAutocomplete(props) {
   );
 
   const checkHighlightedOptionExists = () => {
+    const isSameValue = (value1, value2) => {
+      const label1 = value1 ? getOptionLabel(value1) : '';
+      const label2 = value2 ? getOptionLabel(value2) : '';
+      return label1 === label2;
+    };
+
     if (
       highlightedIndexRef.current !== -1 &&
       previousProps.filteredOptions &&
       previousProps.filteredOptions.length !== filteredOptions.length &&
       (multiple
         ? value.length === previousProps.value.length &&
           previousProps.value.every((val, i) => getOptionLabel(value[i]) === getOptionLabel(val))
-        : getOptionLabel(previousProps.value ?? '') === getOptionLabel(value ?? ''))
+        : isSameValue(previousProps.value, value))
     ) {
       const previousHighlightedOption = previousProps.filteredOptions[highlightedIndexRef.current];
 

packages/mui-joy/src/Autocomplete/Autocomplete.test.tsx

@@ -1975,6 +1975,25 @@ describe('Joy <Autocomplete />', () => {
       });
       expect(textbox).to.have.property('value', 'a');
     });
+
+    it('should not throw error when nested options are provided', () => {
+      const { getByRole } = render(
+        <Autocomplete
+          openOnFocus
+          autoHighlight
+          options={[
+            { property: { name: 'one' } },
+            { property: { name: 'two' } },
+            { property: { name: 'three' } },
+          ]}
+          getOptionLabel={(option) => option.property.name}
+        />,
+      );
+
+      expect(() => {
+        fireEvent.focus(getByRole('combobox'));
+      }).not.to.throw();
+    });
   });
 
   describe('prop: onHighlightChange', () => {

packages/mui-material/src/Autocomplete/Autocomplete.test.js

@@ -2418,6 +2418,26 @@ describe('<Autocomplete />', () => {
       });
       expect(textbox).to.have.property('value', 'a');
     });
+
+    it('should not throw error when nested options are provided', () => {
+      const { getByRole } = render(
+        <Autocomplete
+          openOnFocus
+          autoHighlight
+          options={[
+            { property: { name: 'one' } },
+            { property: { name: 'two' } },
+            { property: { name: 'three' } },
+          ]}
+          getOptionLabel={(option) => option.property.name}
+          renderInput={(params) => <TextField {...params} />}
+        />,
+      );
+
+      expect(() => {
+        fireEvent.focus(getByRole('combobox'));
+      }).not.to.throw();
+    });
   });
 
   describe('prop: fullWidth', () => {