@AugustoAmaral 我没有看到描述中的问题。
即使有多个选择，也没有问题。
多个选择的示例：

import Select from '@mui/joy/Select';
import Option from '@mui/joy/Option';
import IconButton from '@mui/joy/IconButton';
import CloseRounded from '@mui/icons-material/CloseRounded';

export default function SelectClearable() {
  const [value, setValue] = React.useState(['dog']);
  const action = React.useRef(null);
  return (
    <Select
      action={action}
      value={value || []}
      multiple
      placeholder="Favorite pet…"
      onChange={(e, newValue) => setValue(newValue)}
      {...(value && {
        // display the button and remove select indicator
        // when user has selected a value
        endDecorator: (
          <IconButton
            size="sm"
            variant="plain"
            color="neutral"
            onMouseDown={(event) => {
              // don't open the popup when clicking on this button
              event.stopPropagation();
            }}
            onClick={() => {
              setValue(null);
              action.current?.focusVisible();
            }}
          >
            <CloseRounded />
          </IconButton>
        ),
        indicator: null,
      })}
      sx={{ minWidth: 160 }}
    >
      <Option value="dog">Dog</Option>
      <Option value="cat">Cat</Option>
      <Option value="fish">Fish</Option>
      <Option value="bird">Bird</Option>
    </Select>
  );
}