Type: LanguageService

Describe the bug

• OS and Version: Microsoft Windows 10 Pro 10.0.17134 Build 17134
• VS Code Version: 1.31.1
• C/C++ Extension Version: 0.22.0 Insiders
• Other extensions you installed (and if the issue persists after disabling them):
  • Go 0.9.2
  • Output Colorizer 0.1.2
  • Perforce for VS Code 3.1.0
  • Terraform 1.3.7
  • DISABLING these extensions has no effect

Description
After a short term iterating on C++ code (maybe, 10 minutes) VSCode no longer highlights any errors. Any errors highlighted previously stay in perpetuity.

The output window for C/C++ shows that it's still responding to text inputs, e.g:

textDocument/hover
sending 2 changes to server
cpptools/textEditorSelectionChange
textDocument/codeAction
textDocument/hover
sending 41 changes to server
cpptools/textEditorSelectionChange
textDocument/hover
$/setTraceNotification
$/setTraceNotification
$/setTraceNotification
cpptools/activeDocumentChange
cpptools/textEditorSelectionChange
cpptools/textEditorSelectionChange
cpptools/textEditorSelectionChange
textDocument/didChange
cpptools/textEditorSelectionChange
textDocument/codeAction
textDocument/didSave
  tag parsing file: FILE.CPP
textDocument/didChange
cpptools/textEditorSelectionChange
textDocument/didSave
  tag parsing file: FILE.CPP
Database safe to open

Reloading the window restores functioning intellisense.

To Reproduce
Iterate on C++ code for any sufficiently large project.

Expected behavior
Intellisense should respond to any errors introduced in code.

Screenshots

Above: Old error from variable that didn't exist before remains. Intellisense not responding the the garbage lslsl added, even after saving the file.

Additional context
C_Cpp.loggingLevel is set to Debug.