Burmese output issue on using Section Marker and Running Header

I created a Burmese manual to be written with Burmese unicode enconding and found an error on the texts to be generated by Section Marker and Running Header features.

<figure 1>

<figure 2>

Problem is:

1. In figure 1, the blue-colored box is the heading to be input directly and the red-colored box is the bookmark to be generated automatically by the Section Marker feature. 
2.  In figure 2, the red-colored box (upper one) is the heading to be generated automatically by the Running Header feature.
3.  The blue-colored box is correctly displayed but the red-colored boxes are represented INCORRECTLY. I tried to change a few of settings such as the fonts to fix it, but there was no change.

Is this a bug of InDesign?