Have two items and problem height

[Kittinut Pramhan]

 <div id="search-input-body-box" style={{ overflow: 'auto', maxHeight: 'calc(100% - 45px)' }}>
      <ReactList
        threshold={200}
        itemRenderer={RenderItem({ options, columns, ...props })}
        length={options.length || 1} // if no options will return 1 to activate `ReactList` to render default item.
        type="variable"
      />
    </div>

Gif

please tell me how to fix this thx