Kannada Language Text not displaying correctly in Indesign

@Joel – my guess here is it should look like this:

Just opened the provided docx file in TextEdit app without installing the ttf font.
The screenshot is showing a substitute font in TextEdit.

InDesign (with the right font installed SHREE0850.TTF) is showing 4 characters (or glyphs) for the contents of the first selectable "entity":

And also 4 charcaters (or glyphs) for the contents of the second "entity":

Unfortunately not all Unicode codes are visible in the Info panel. And that entity seems to be one "word". Don't know, if using the term "word" here makes any sense.

I wanted to know, what's going on and duplicated every single "character" of the two "words" or "entities" to a different text frame:

Still don't know what's going wrong, but maybe you can make something out of this.
How did I duplicated the single characters? By scripting in ExtendScript/JavaScript. I selected one "entity" (is it a word?) and ran the following script:

var myDoc = app.documents[0];
var mySelChars = app.selection[0].characters.everyItem().getElements();

for(var n=0;n<mySelChars.length;n++){
    mySelChars.duplicate(
   
        LocationOptions.AT_BEGINNING,
        myDoc.pages[0].
        textFrames.add({
            geometricBounds:[0,0,"50mm","60mm"]
            }).
        insertionPoints[0]
       
        );
    };

Uwe