[Edge] Undo-redo flicker when style applied

[Tade0]

Steps to reproduce ¶

1. Build latest master.
2. Open the /samples page and apply the "Special Container" style to the content.
3. Hit Undo twice

Expected result ¶

After first undo nothing interesting should happen.

Actual result ¶

On second undo the style appears for a split second only to disappear.

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

Edge 14.14393

[Marek Lewandowski]

Can't reproduce it. Is there any particular block, where the style should be applied? Should undo be hit with keyboard or a UI button and a mouse?

[Marek Lewandowski]

@t.jakut can't reproduce it either.

[Tade0]

Different procedure:

1. Apply the "Special container" style to "hello world"
2. Undo.
3. Apply the style again.
4. Undo.
5. Redo.
6. Try to undo.

[Jakub Ś]

I could not reproduce it as well with any of given test cases.