codenameone iOS build freezes

Question

I have small app that I built with Codename One, it runs ok in the simulator and on Android devices. But it freezes on my iPhone. I used the iOS-debug in Netbeans to create the iOS build. I did some testing using the Dialog.show to find were it is freezing on my iPhone 12. The app sends a request to a web service and I receive the return data ok, but it freezes when parsing the JSON data to a map. I works in the simulator and on Android devices. I put a Dialog wright before the parsing and another after the parse to map is done. I never see the that Dialog because it freezing at that point. Below is the code.

    // --- call webservice Points Lookup WEBR419r2 ---
    Response<String> response = Rest.post(PointsLookup_URL).jsonContent()
            .body(jsonInput).getAsString();
    System.out.println(response.getResponseCode());
    //Dialog.show("Rest reply 1", "getResponseCode", "OK", null);
    String returnData = response.getResponseData();
    System.out.println(returnData);
    Dialog.show("Rest reply 1", returnData.substring(0, 80), "OK", null);
        
    JSONParser json = new JSONParser();
    try(Reader r = new InputStreamReader(
            new ByteArrayInputStream(returnData.getBytes()))) {
        map = json.parseJSON(r);
        Dialog.show("JSON map 2", map.toString(), "OK", null);
        System.out.println("*** WEB SERVICE call ok ***");
        Dialog.show("Reader  2", "*** WEB SERVICE call ok ***", "OK", null);
    } catch (IOException ex) {
        System.out.println("Error " + ex);
        Dialog.show("Rest reply 2E", ex.toString(), "OK", null);
    }        

I ran the app in the simulator and tested it on a android and iPhone.