Bug type: Language Service

Describe the bug
VS Code Version: Version: 1.62.3 (user setup)
Commit: ccbaa2d27e38e5afa3e5c21c1c7bef4657064247
Date: 2021-11-17T08:11:14.551Z
Electron: 13.5.2
Chrome: 91.0.4472.164
Node.js: 14.16.0
V8: 9.1.269.39-electron.0
OS: Windows_NT x64 10.0.19042

• C/C++ Extension Version: 1.8.0
• Other extensions you installed (and if the issue persists after disabling them): Platformio, Auto Build Marlin, Material Icon Themes, Python, STM32 for vscode, Github pull request
• If using SSH remote, specify OS of remote machine: none
• A clear and concise description of what the bug is, including information about the workspace (i.e. is the workspace a single project or multiple projects, size of the project, etc).
• single project workspace, when C++ intellisense is updated to 1.8.0 inactive region dimming stops functiioning and all code is active (not dimmed), reverting back to 1.7.1 fixes issue.

Steps to reproduce

1. Go to '...'
2. Click on '....'
3. Scroll down to '....'
4. See error

Expected behavior
inactive region dimming

Code sample and logs

• Code sample

• Configurations in c_cpp_properties.json

• Logs from running C/C++: Log Diagnostics from the VS Code command palette

• Logs from the language server logging

Screenshots

Additional context