Scope inspector bug when extending C++ syntax highlighting through Textmate grammar

• VS Code Version: 1.63.2
• OS Version: Darwin x64 21.1.0

Steps to Reproduce:

1. created a vscode extension
2. contributed to C++ grammar by writing the following Textmate grammar file (see snippet 1) and setting the extension's package.json to contribute correctly (see snippet 2)
3. built the extension and ran it on Extension Development Mode
4. used Inspect Editor Scopes tool to check a token that matches to a custom defined Regex within my extended Textmate grammar file
5. PROBLEM: inspector doesn't show my custom textmate scope

Snippet 1)

{
	"scopeName": "source.cpp",
	"fileTypes": [
		"cpp",
		"c++",
		"c"
	],
	"patterns": [
		{
			"include": "#expression"
		}
	],
	"repository": {
		"expression": {
			"patterns": [
				{
					"include": "#clog-db"
				},
				{
					"include": "#indent-DB"
				},
				{
					"include": "#array-db"
				},
				{
					"include": "#sample"
				}
			]
		},
		"clog-db": {
			"begin": "^\\s*clog",
			"end": "<<[^;]+;",
			"name": "cpdebug.clog"
		},
		"indent-DB": {
			"match": "^\\s*DB\\(\\);",
			"name": "cpdebug.indentdb"
		},
		"array-db": {
			"match": "^\\s*dba(2)?\\([^;]+\\);",
			"name": "cpdebug.arraydb"
		},
		"sample": {
			"match": "clog",
			"name": "cpdebug.sample"
		}
	}
}

Snippet 2:

	"contributes": {
			"languages": [
				{
					"id": "cpp",
					"extensions": [
						".cpp"
					]
				}
			],
			"grammars": [
				{
					"language": "cpp",
					"scopeName": "source.cpp.debug",
					"path": "./syntaxes/cpp.tmGrammar.json",
					"injectTo": [
						"source.cpp"
					]
				}
			]
		},

Reproduce the issue using the provided TextMate grammar snippet, extension package.json contribution, and Extension Development Mode. Start with the Inspect Editor Scopes behavior for the custom regex matches and compare the injected source.cpp grammar configuration. Done means the inspector displays the custom cpdebug scopes for matching tokens.