Hi Alex,
Thanks for your detailed explanation and for clearly outlining the steps you’ve already tried, that helps a lot.
At this time, Windows does not provide documented controls to customize the visual styling of Search category filters. If you’d like Microsoft to consider adjusting or clarifying this UI behavior, submit feedback via Feedback Hub
- Press Windows key + F
- Open “Feedback Hub”
- Category: Desktop Environment > Start Menu / Search
- Include your screenshot and mention the persistent underline state
Official guidance on submitting UI feedback: Send feedback to Microsoft with the Feedback Hub app
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