MH system actually works quite interestingly. THE OLCI system.

In my experience, with a MH PNR, you can do OLCI for flights in any sequence you want as long as it is T-48. Example, LHR-KUL-BKK. You can do LHR-BKK all the way, LHR-KUL, or KUL-BKK only. So it might work if you have a MH PNR.