SLDS Validator breaks Vscode Emmet

[a-v-w]

Summary

VsCode "emmet" feature breaks when SLDS Validator extension is enabled.

Steps To Reproduce:

1. Enable SLDS Validator
2. Attempt to use the following: div.test-class [TAB]

Expected result

When pressing [TAB} it should output the following HTML: <div class="test-class"></div>

Actual result

Does not invoke the emmet abbreviation and just inserts a tab.

Additional information

I have tested this in CSS with the same result.
I have also tested this on multiple machines as well as a Mac.
This issue also seems to be isolated to files within an SFDX project.

VS Code Version:
1.48.0

SFDX CLI Version:
sfdx-cli/7.69.0-c7be45ae22 win32-x64 node-v12.18.3

OS and version:
Windows 10.0.18362 Build 18362

Without SLDS Validator

With SLDS Validator

[billyma]

@DeadlySemiColon - While we are investigating on the issue, can you try if ⌃Space then TAB result in the same in the same behavior? Thanks.