IE11: Widget selection lost after Undo & Redo

[Satya Minnekanti]

Steps to reproduce

1. Open Media Embed sample [​​http://sdk.ckeditor.com/samples/mediaembed.html]
2. Delete existing content, add few paragraphs of text
3. Embed a video in between paragraphs by using Media Embed dialog.
4. Switch to source, change widget alignment to center by adding

   class="embed-narrow embed-align-center"
   

5. Switch back to Richtext, select the widget
6. Click Undo
7. Click Redo

Issue: Widget selection lost and first paragraph in editor body gets selected

[kkrzton]

Tested in IE11 (11.0.10240.16724) on Windows 10 using ​http://sdk.ckeditor.com/samples/mediaembed.html but cannot reproduce this issue.

@j.swiderski could you take a look also, maybe it's the matter of different OS/browser version?

[Irina]

Another way to reproduce this issue:

1. Open Placeholders sample [​​​http://sdk.ckeditor.com/samples/placeholder.html]
2. Double click on the 'Case ID' placeholders to open the dialog
3. Update placeholder's name, e.g. 'Case ID' to 'Case ID 1'.
4. Click 'OK' button.
5. Observe that placeholder 'Case ID 1' is selected.
6. Click Undo toolbar button.
7. Click Redo toolbar button.

Expected result

Widget 'Case ID 1' is selected.

Actual result

The first paragraph in the editor is selected.

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

IE11 on Windows 7

[Jakub Ś]

Please see attached video. It seems that this is some secial test case.

After step 7 you need to perform 3 more in order to reproduce this issue.

8. Widget is focused but click on it one more time
9. Click Undo
10. Click Redo

I have been able to reproduce this issue with these 3 extra steps in CKEdiotr 4.3. with image2 plugin

[Marek Lewandowski]

cc

[kkrzton]

It also happens on EDGE (version 20.10240.16384.0) - following the scenario pointed by @j.swiderski.