Last added object overrides my ArrayList

Question

Last objected added to the ArrayList overrides all elements in the ArrayList and I can't figure it out why.. even after reading all problem related topics on web.

I create new object each iteration? and all fields (move, board, color) are protected (I can't change that since I'm using a chessboard framework).

I haven't found the solution on web because my fields ain't static and I also create a new object after each iteration.

public String solve(String fen) {
    Chessboard cb = Chessboard.getChessboardFromFEN(fen);
    return solve(cb);
}

private String solve(Chessboard cb){
 ArrayList<Chessboard> prioritetna = new ArrayList<>();
 for(int i = 0; i < 10; i++){
  cb.makeMove(cb.getMoves().get(i));
  prioritetna.add(new Chessboard(cb.getBoard(), cb.getColor(), 
  cb.getMovesLeft()));
  cb.reverseMove(cb.getMoves().get(i));
 }
 return "";
}

And I use this framework that is made of three classes for Chessboard implementation: 1. Chessboard: https://pastebin.com/CqgHLCXM 2. Move: https://pastebin.com/g2wr16TP 3. Rules: https://pastebin.com/HEznyECY

I've also rewrote code with no framework dependencies and it works.. so i guess this is a framework problem.

Framework is also available as a JAR: https://ufile.io/c7n3o

public static void main(String[] args) {

    ArrayList<Object> list = new ArrayList<>();
    Random rand = new Random();

    for(int i = 0; i < 5; i++){
        list.add(new Object(rand.nextInt(50) + 1, rand.nextInt(50) + 1));
    }

    for(int i = 0; i < 5; i++){
        System.out.println(list.get(i).getOne());
    }

  }


public class Object {
  protected int one;
  protected int two;
public Object(int one, int two){
    this.one = one;
    this.two = two;
}

public int getOne() {
    return one;
}

public void setOne(int one) {
    this.one = one;
}

public int getTwo() {
    return two;
}

public void setTwo(int two) {
    this.two = two;
}

}