Japanese Multi-Byte Character doesn't work after some breaks

[Sugimoto]

Steps to reproduce

1. Open IE with Microsoft IME
2. Type multi byte character (Dont' use copy & paste when you try reproducing this.)
   あいうえお ( a i u e o Return Return )
   かきくけこ ( k a k i k u k e k o Return Return )
   さしすせそ ( s a s i s u s e s o Return Return )
   たちつてと ( t a t i t u t e t o Return Return )
   なにぬねの ( n a n i n u n e n o Return Return )
   はひふへほ ( h a h i h u h e h o Return Return )
   
3. In step of へ ( h e ), はひふ are hided.

Expected result

Multi-byte characters should be displayed properly

Actual result

Multi-byte characters are not displayed temporary.

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

It reproduces in the below conditions.

• Windows OS
• IE 9/10/11
• Microsoft IME

Firefox, Chrome and Google Japanese input cannot reproduce this.
And can be reproduced on ​http://ckeditor.com/demo standard version.

[Sugimoto]

Reproduce movie

[Jakub Ś]

I have been able to reproduce this problem from CKEditor 4.0.0 in IE browsers only.

Other browsers seem to work fine.

[Abhishek Gupta]

This is happening in MS Edge as well. Any update on when can we get this fixed?

[Jakub Ś]

We are not planning to work on this ticket before 4.6 release. I have notified the team and hopefully we will have a look at it before 4.6.1 or 4.6.2 release.

Ticket was marked "to check" but please leave a comment after 4.6 release just to remind there is still some interest in the ticket.