Warning “warning: Expected (<resource> | <url>) but found 'none'“ is thrown when setting Font Asset to None in UI Builder window

Steps to reproduce:
1. Open the user’s project
2. Open TestUIDocument.uxml (Assets → UIAssets)
3. Expand TestStyle.uss and select .style1
4. Set Font Asset to None in the UI Builder Inspector
5. Save and observe the Console

Expected result: No warning
Actual result: Warning “Assets/UIAssets/TestStyle.uss (line 3): warning: Expected (<resource> | <url>) but found 'none'“ occurs

Reproducible with: 2021.3.11f1, 2022.1.18f1, 2022.2.0b10, 2023.1.0a13
Could not test with: 2020.3.40f1 (Console error)

Reproduced on: macOS Monterey 12.5.1 (Intel)

Workaround:
1. Open TestStyle.uss
2. Delete “-unity-font-definition: none;” line of code

Notes:

• Throws “IndexOutOfRangeException: Index was outside the bounds of the array” error at the 4th step (Often)
• Same issue with Font