Totally new at codeing and im not able to find out why my loop skips my Scanner function

Question

My while loop does not go to my next user input "y1".. it just loops back. user input "y" works, i give a value, it calculates, waits the 2000 ms and then loops. Any ideas? Sorry for the messy code, still learning.

   if (x1.equalsIgnoreCase("JA")) {
            while (true) {
                System.out.println("Hvad er beløbet?");
                double y = scanner.nextDouble();
                System.out.println(y * 6.6296);
                wait(2000);
                System.out.println("Vil du indtaste et nyt beløb?");
                String y1 = scanner.nextLine();
                if (y1.equalsIgnoreCase("JA")) {
                }
                
                if (y1.equalsIgnoreCase("NEJ")) {
                    break;
                }

            }
        }