Cursor disappears when using the plugin inside an app bar

I've implemented this package in my app. it is toggle-able inside my app bar (i.e. it replaces the text title when the user clicks on a search icon button, and is replaced by the text title when the user clicks the 'X' button.

I've noticed though that when inside the app bar, the cursor has complete disappeared. I don't know if it is because it is inside the app bar and therefore a bug in the package, or if I have possibly, somehow, 'turned it off' via my own implementation mistake.

Below is my implementation of the package. Hopefully there's a simple solution, since it isn't user-friendly to have a textfield without a cursor. Thanks!

_searchTextField = AutoCompleteTextField<Fruit>(
  controller: _searchBarController,
  decoration: InputDecoration(
    hintText: 'Find your fruit here...',
    border: InputBorder.none,
    fillColor: Colors.white,
    contentPadding: EdgeInsets.symmetric(horizontal: 10.0, vertical: 10.0),
    filled: true,
  ),
  itemBuilder: (context, item) {
    return Padding(
      padding: EdgeInsets.only(
        top: 5.0,
        left: 10.0,
        right: 10.0,
        bottom: 5.0,
      ),
      child: Column(
        mainAxisAlignment: MainAxisAlignment.center,
        crossAxisAlignment: CrossAxisAlignment.start,
        children: <Widget>[
          Text(
            item.name,
            style: kSearchBarTextStyle,
          ),
          SizedBox(height: 2.0),
          Row(
            children: <Widget>[
              Text(
                item.variety,
                style: kSectionSubtitleTextStyle,
              ),
              SizedBox(width: 10.0),
              Text(
                item.country,
                style: kSectionSubtitleTextStyle,
              ),
            ],
          ),
          SizedBox(height: 2.0),
          Row(
            children: <Widget>[
              Text(
                item.colour,
                style: kSectionSubtitleTextStyle,
              ),
            ],
          ),
        ],
      ),
    );
  },
  itemFilter: (item, query) {
    return item.searchTerm.toLowerCase().contains(query.toLowerCase());
  },
  itemSorter: (a, b) {
    return a.searchTerm.compareTo(b.searchTerm);
  },
  itemSubmitted: (item) {
    setState(() {
      _searchTextField.textField.controller.text = item.name;
      country = item.country;
      colour = item.colour;
      name = item.name;
      variety = item.variety;
    });
  },
  key: key,
  suggestions: FruitsViewModel.fruits,
  clearOnSubmit: false,
);

felixmccuaig / flutter-autocomplete-textfield

Cursor disappears when using the plugin inside an app bar #78