Two or more superior diacritics on one base character

[HaDavids]

Defect Report

We are using Noto Sans Myanmar. Version 2.001 ttfautohing (v.1.8.2) That includes all weights in this font family.

Title

Two or more superior diacritics on one base character

Font

NotoSansMyanmar-[all weights].ttf

Where the font came from, and when

For example:
Site: https://noto-website-2.storage.googleapis.com/pkgs/NotoSansMyanmar-hinted.zip
Date: 2020-10-02

Font Version

Noto Sans Myanmar. Version 2.001 ttfautohing (v.1.8.2)

OS name and version

Microsoft Windows 10 Pro, version 10.0.19043 Build 19043.

Application name and version

Microsoft Word 2019

Issue

By mistake when typing more than one superior diacritic on one base character you cannot see that this has been done. It should follow the behavior of inferior diacritics. When you type by mistake more than one inferior diacritic on one base character the second etc. diacritic will not combine with the base character.

1. Open a Word document

2. Load the Windows Burmese keyboard

3. Type "u"+"d+d+d". You cannot see that you typed three superior diacritics because they are on top of each other like in this screenshot.
   

4. It should look like ကိိိ

Character data

Please include real character data to illustrate your issue-- Unicode codepoints are helpful. This makes it possible for developers who don't know the language or script to copy/paste the text to reproduce the issue.