Error - problem with korean alphabet

[RH Tasin]

So I am working with Korean language in OpenOffice and I have counter a problem.
ㄴ is working fine beside a Korean alphabet but if I put any other character on 
the left side of it then this alphabet is becoming unreadable as you can see in 
the below image. This is not happening with other Korean alphabets. At least I 
haven't countered any till now except this.
please fix this problem and make OpenOffice better.
[Screenshot_8.png]