Draft-js: Composing character disappear when click other block or place

[GenesisSam]

Do you want to request a feature or report a bug?
a bug

What is the current behavior?
When i typing Korean and it's during composing mode.
if move cursor, my composing character is disappear...

If the current behavior is a bug, please provide the steps to reproduce and if possible a minimal demo of the problem. You can use this jsfiddle to get started: https://jsfiddle.net/stopachka/m6z0xn4r/.
it's happened on Facebook.com, Draft.js

What is the expected behavior?
move cursor and composing character is composite done(it means, not disappear)

Which versions of Draft.js, and which browser / OS are affected by this issue? Did this work in previous versions of Draft.js?

Mac Book pro 13": 10.12.5
Chrome: 59.0.3071.115(official build)
FireFox: fine
Safari: fine

Windows, sorry i can't tested...

[flarnie]

I was able to reproduce this - thanks for reporting!

Looks like this does work as expected in other text areas on the web - just checked gmail and quip and they both do the right thing here.

Of the top of my head I'm not sure of the cause or when this was introduced. Seems serious though - I'll open a task internally for us to look into it.

@spicyj any ideas on this one? Just tagging you since you've looked at Korean input bugs before.

[sophiebits]

Hm. We need to force the composition to resolve, maybe in response to the onSelect event? Not sure what we're doing now without looking at the code.

[CENOS92]

@sophiebits
I have the exact same issue with that. Is there any solution?

I think this bug occurs in the mouseDown event.
When I click or select any part of the window or draft-js editor, the last character disappears.

[goodhyun]

This bug was kind of fixed after DOMObserver was introduced. You can take a look at them from the master.
However, it can also be cured by modifying DraftEditorCompositionHandler.js for the older version 0.9.1
https://gist.github.com/goodhyun/3539a16951f368ce756da205d37c85e5