[IOS] Editor scrolls back to top of the page

[Test again test]

When we click/select the "Paragraph Format button" in iphone 6 & 5, the page scrolls top of the page. Sometimes scrolls at the bottom.

Refer the following demo link, which has only less features of the editor configured but the scroll issue exist.

​https://alfonsoml.blogspot.in/2012/04/placeholder-text-in-ckeditor.html

Steps to reproduce

1. Open the above link in iphone 6 or 5
2. Click the "Format" button or select any values in the "Paragraph Format dropdown"
3. Now see where the page goes

Expected result

It should stay in the editor without scroll

Actual result

Scrolls top/bottom of the page

Other details (browser, OS, CKEditor version, installed plugins)

Device: Iphone 5 & 6, Browser: Safari

I can find that there are other tickets already raised related to this (#11730, #10694, #12749), but this issue still remains in the latest version of the editor.

[m-turek]

I was able to reproduce this issue on CKEditor 4.6.2, iOS 10.2.1, Safari 10.0 with following reproduction steps:

1. Open a CKEditor sample with some text so that editor can be scrolled.
2. Scroll down a bit and place cursor there.
3. Click "Format" button and select 'Heading 3' from "Paragraph format" dropdown.

Result: Editor's text is scrolled up to the beginning. Not possible to scroll anymore.