No code highlighting after extension activation

[arkada38]

Describe the bug

When opening the notebook, code highlighting is present in the cells for some time. However, after activating the extension, the code highlighting disappears.

[info] [Error - 15:11:53] Document pull failed for text document vscode-notebook-cell:path_to_file
[info]   Message: Failed to get language for textDocument/diagnostic
  Code: -32000 
[object Object]

Please complete the following:

Which version of .NET Interactive are you using?

Version: 1.0.621602+9ac1a4da0a0b43ca794f936f635934a55fa5cdf3

Library version: 1.0.0-beta.25216.2+9ac1a4da0a0b43ca794f936f635934a55fa5cdf3

• OS
  • Windows 11 arm
• Frontend
  • Visual Studio Code

Screenshots