Steps to reproduce the issue:
1. Download and open attached project.
2. Open scene named "main".
3. Notice the right most character in the "Game" window.
4. Enter the Play mode.
5. Notice the output of the "Console" window:

Character length = 8
\u0E1E\u0E37\u0E48\u0E17\u0E35\u0E48\u0E1B\u0E47

6. Open https://www.branah.com/unicode-converter or any other Unicode Converter.
7. Enter these codes: "\u0E1E\u0E37\u0E48 \u0E17\u0E35\u0E48 \u0E1B\u0E47".

Actual result:
The location of combinational Thai font character is different that the one drawn in the "Game" window.

Expected result:
The location of combinational Thai font character and the one drawn in the "Game" window should not differ.

Reproduced with:
5.1.5f1, 5.2.5f1, 5.3.6p2, 5.4.0f3, 5.5.0a5.

Note:
Pictures attached.