Cannot send keys to UITextField when UIAlertController is presented

I’m can’t type texts into the textfield of an UIAlertController.

   WebElement field = (new WebDriverWait(driver, 5).until(ExpectedConditions.presenceOfElementLocated(By.xpath("//XCUIElementTypeTextField"))));;

    // [1] This used to work in previous Appium versions, not it doesn't
    // [2] Doesn't work either	

    public void typeTextIntoAlert(String test){
		char[] charArray = test.toCharArray();
		for(int i = 0; i < charArray.length; i++){
			driver.findElement(By.xpath(String.format("//XCUIElementTypeKey[@name='%s']", Character.toString(charArray[i]).toLowerCase()))).click();

I’m using Appium 1.6.1 installed via terminal.

Error logs on eclipse:

      "An element could not be located on the page using the given search parameters. (WARNING: The server did not provide any stacktrace information)"

Error log via command line:

      [debug] [BaseDriver] Valid locator strategies for this request: xpath, id, name, class name, -ios predicate string, accessibility id
      [debug] [BaseDriver] Waiting up to 0 ms for condition
      [debug] [JSONWP Proxy] Proxying [POST /element] to [POST http://localhost:8100/session/ADBD4FF9-8340-4A67-B986-0265A9D5A28C/element] with body: {"using":"xpath","value":"//XCUIElementTypeKey[@name='t']"}
      [debug] [JSONWP Proxy] Got response with status 200: {"value":"Alert is obstructing view","sessionId":"ADBD4FF9-8340-4A67-B986-0265A9D5A28C","status":26}

This worked in earlier versions. I had to update my Appium version because of long press action but doing so, this has been broken.