Pylance's semantic highlighting doesn't work properly on VSCodium

[burritosoftware]

Describe the bug
Whilst code completions and other features of Pylance seem to work correctly in VSCode, the semantic highlighting (where imports are highlighted amongst others) doesn't seem to function.

Please confirm that this problem is VSCodium-specific

• This bug doesn't happen if I use Microsoft's Visual Studio Code. It only happens in VSCodium.

Please confirm that the issue/resolution isn't already documented

• I checked the Docs page and my issue is not mentioned there.

To Reproduce
Steps to reproduce the behavior:

1. Go to a Python file with imports whilst using the Pylance language server.
2. Observe a difference between the same file with same setup on VSCode and VSCodium.

Expected behavior
Imports would be highlighted.

Screenshots
VSCodium:

VSCode:

Desktop (please complete the following information):

• OS: Windows 10 21H2
• Architecture x64
• Version 1.68.1

Additional context
N/A

[paulcarroty]

#935

[burritosoftware]

#935

I already tried this workaround and it doesn't seem to fix semantic highlighting. I can try one more time to be sure.