[macos] Wrong chars emitted when entering certain char-sequence of Indic language

ADDITIONAL SYSTEM INFORMATION :
MacOS Monterey 12.0.1 (21A559)

A DESCRIPTION OF THE PROBLEM :
javax.swing.* and java.awt.* emits wrong chars when entered specific allowed char-combination of Indic languages (especially sanskrit)

STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
In any JTextField or TextField, try entering valid sanskrit Consonant combination like 'स्तु' using MacOS inbuilt 'Devanagari QWERTY' keyboard.

Correct keys to get 'स्तु' (in Safari browser/etc) -- where there is no bug:
s f t u

Bug exists in JDK java.swing|awt.*.
If one enters above char-sequence ' s f t u' , JTextField shows 'स््ु' -- which is is wrong.

To get correct char-sequence, one needs to type two DELETE-key-strokes and type again 't u' , which now emits correct key-combo 'स्तु' in JTextField/TextField



---------- BEGIN SOURCE ----------
/* Below case sample swing TextField app. In which , one needs to type above char-sequence to get the bug reproduced */
package org.gvn;
import javax.swing.*;
public class Main {
    public static void main(String[] args) {
        JFrame f=new JFrame();//creating instance of JFrame
        f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        JTextField b=new JTextField("click");
        b.setBounds(130,100,100, 40);

        f.add(b);

        f.setSize(400,500);
        f.setLayout(null);
        f.setVisible(true);

    }
}
---------- END SOURCE ----------

FREQUENCY : always