Other languages(korean..) isn't working after @3.7.2

[hyesung219]

How can we reproduce this bug?

1. Step one

Type @한글(korean)

What did you expect to happen?

Version @3.7.1 is working as I expected but not after.

What happened instead?
can't compositing one word when the mention function starts

https://codepen.io/gdev219/pen/RwNqoVE?editors=1010

Link (jsfiddle/plunkr/codepen) or Screenshot:
here is the working pen
FYI If you want to make a word or a character you have to make a combination with consonant(ㄱ,ㄴ,ㄷ,ㄹ ..) with vowel(ㅏ,ㅑ,ㅣ,ㅓ...)
After version 3.7.2 compositing a character isn't working at all.

Here is working pen.
https://codepen.io/gdev219/pen/RwNqoVE?editors=1010

[hyojin]

Hi @hyesung219
I'm facing the same issue and found that the new way of getting caret position breaks composition.
Not sure my PR will be merged or not but will send today or tomorrow.

[mrsweaters]

Fixed in #394