Chrome Version       : 54.0.2840.0
CrOS                 : 8743.13.0 - Candy
URL                  : docs.google.com

What steps will reproduce the problem?
(1)  open google document / Presentation
(2)  set IME to Korean
(3)  enter "gks",한 and hit space key
(4)  enter "gksrmf" and hit space key


What is the expected result?
on step#3, "한" should appear
on step#4, "한글" should appear

What happens instead?
on step#3,"한한" appears.  
on step#4, "한한글 글" appears. 



Please provide any additional information below. Attach a screenshot if
possible.