Android : AutoCompleteTextView not working after backspace

I have been searching the web the whole damn day on this, hope some of you can help me.

Currently my AutoCompleteTextView works as long as i don't press backspace.

Adapter

public class IngredientAutoCompleteAdapter extends ArrayAdapter<Ingredient> implements Filterable{
private static final String TAG = "IngredientAutoCompleteAdapter";
private Context context;
private List<Ingredient> ingredients;
private DomainFacade service;
private Filter filter;

public IngredientAutoCompleteAdapter(Context context, int resource, List<Ingredient> objects) {
    super(context, resource, objects);
    this.context = context;
    ingredients = objects;
    filter = new IngredientNameFilter(ingredients);
    try {
        service = DomainFacade.getinstance();
    } catch (ServiceException e) {
        e.printStackTrace();
    }
}

@Override
public Ingredient getItem(int position) {
    return ingredients.get(position);
}

@Override
public long getItemId(int position) {
    return position;
}

@Override
public Filter getFilter() {
    return filter;
}

@Override
public View getView(int pos, View convertView, ViewGroup parent) {
    //get inflater to inflate the listview with its rows
    LayoutInflater inflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
    //init View that holds the entire row
    View rowView = inflater.inflate(R.layout.autocomplete_row, parent, false);
    //init TextViews
    TextView nameTXTV = (TextView) rowView.findViewById(R.id.autocomplete_row_txtv_name);
    TextView calTXTV = (TextView) rowView.findViewById(R.id.autocomplete_row_txtv_cal);
    TextView fatTXTV = (TextView) rowView.findViewById(R.id.autocomplete_row_txtv_fat);
    TextView purchaseTXTV = (TextView) rowView.findViewById(R.id.autocomplete_row_txtv_lastpurchase);
    //Set font styles
    FontLoader.GRANDHOTEL_REGULAR.apply(context, nameTXTV);
    FontLoader.ELLIPTICA.apply(context, calTXTV);
    FontLoader.ELLIPTICA.apply(context, fatTXTV);
    FontLoader.ELLIPTICA.apply(context, purchaseTXTV);
    //set text
    Logger.log(TAG, ingredients.toString());
    Logger.log(TAG, pos + " - " + ingredients.get(pos).getName());
    nameTXTV.setText(ingredients.get(pos).getName());
    calTXTV.setText("Cal: " + ingredients.get(pos).getCal());
    fatTXTV.setText("Fat: " + ingredients.get(pos).getFat());
    String date;
    if (!service.getIngredientLastPurchaseDate(ingredients.get(pos).getName()).equals(new Date(0))) {
        //format date nicely
        date = DateFormat.getInstance().format(service.getIngredientLastPurchaseDate(ingredients.get(pos).getName()));
    } else {
        date = "never";
    }
    purchaseTXTV.setText("Last purchase: " + date);


    return rowView;
}

//Filter
private class IngredientNameFilter extends Filter {
    private static final String TAG = "IngredientNameFilter";
    private final List<Ingredient> data;

    public IngredientNameFilter(List<Ingredient> data){this.data=data;}

    @Override
    public String convertResultToString(Object resultValue) {
        return  ((Ingredient)resultValue).getName();
    }

    @Override
    protected FilterResults performFiltering(CharSequence constraint) {

        List<Ingredient> result = new ArrayList<>();
        if(constraint != null) {
            Logger.log(TAG,"constraint="+constraint.toString());
            Logger.log(TAG,"ingredients="+data);
            for (Ingredient ingredient : data) {
                if(ingredient.getName().toLowerCase().contains(constraint.toString().toLowerCase())){
                    result.add(ingredient);
                }
            }
            FilterResults filterResults = new FilterResults();
            filterResults.values = result;
            filterResults.count = result.size();
            Logger.log(TAG,"filterResults="+filterResults.values);
            return filterResults;
        } else {
            return new FilterResults();
        }
    }

    @Override
    protected void publishResults(CharSequence constraint, FilterResults results) {
        clear();
        Logger.log(TAG,"publishResult");
        Logger.log(TAG,"constraint="+constraint);
        Logger.log(TAG,"FilterResults="+results.values);

        if (results != null && results.count > 0) {
            // we have filtered results
            addAll((ArrayList<Ingredient>) results.values);
        } else {
            // no filter, add entire original list back in
            addAll(data);
        }

        notifyDataSetChanged();
    }

}
}

Note that this is a seprate class, meaning it does not run within a UIThread.

Fragment

    public static class NewIngredientFragment extends Fragment {
    protected AutoCompleteTextView ingredientNameACTV;
    protected EditText calED, fatED, qtyTV;
    private DomainFacade service;

    public static NewIngredientFragment getInstance() {
        return new NewIngredientFragment();
    }


    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
                             Bundle savedInstanceState) {
        View v = inflater.inflate(R.layout.fragment_new_ingredient, container, false);
        try {
            service = DomainFacade.getinstance();
        } catch (ServiceException e) {
            e.printStackTrace();
        }
        initLayoutComponents(v);
        // Inflate the layout for this fragment
        return v;

    }

    private void initLayoutComponents(View view) {
        ingredientNameACTV = (AutoCompleteTextView) view.findViewById(R.id.newIngredient_name_ACTV);
        calED = (EditText) view.findViewById(R.id.newIngredient_cal_ET);
        fatED = (EditText) view.findViewById(R.id.newIngredient_fat_ET);
        qtyTV = (EditText) view.findViewById(R.id.newIngredient_qty_ET);
        //List<String> ingredients = new LinkedList<>(service.getIngredients().keySet());
        List<Ingredient> ingredients = new LinkedList<>(service.getIngredients().values());
        Logger.log(TAG, ingredients.toString());
        //IngredientAutoCompleteAdapter adapter = new IngredientAutoCompleteAdapter(view.getContext(), R.layout.autocomplete_row, ingredients);
        ingredientNameACTV.setAdapter(new IngredientAutoCompleteAdapter(view.getContext(),R.layout.autocomplete_row, ingredients));
        ingredientNameACTV.setThreshold(1);
    }


}

Note, this Fragment class is an inner class within a FragmentPagerAdapter, which then again is a inner class within a ActionBarActivity