🐛 Bug: Dark mode navbar shows stray black underline on hover after page load

[waygeance]

Describe the bug

• In dark mode on https://json-schema.org/ the navbar items (e.g., Specification, Docs, Tools, Blog, Community) show unwanted black underline lines when hovered.

• This issue does not appear immediately on page load. It starts appearing after ~2–3 seconds once the website finishes loading styles/resources and we hower it few times.

• The underline looks like a rendering/glitch artifact rather than intended styling.

Screencast:

2026-01-29.13-49-20.mp4

Steps To Reproduce

1. Go to https://json-schema.org/
2. Enable dark mode (moon icon in navbar)
3. Wait 2–3 seconds after the page fully loads
4. Hover over navbar items like Specification, Blog, Community multipe times.
5. Observe thin black lines appearing under the text

Expected Behavior

Hovering over navbar items in dark mode should show the intended highlight/underline effect without any black glitch lines.

Screenshots

Attached Above.

Device Information [optional]

- OS:Ubuntu (latest)
- Browser: Brave
- version:

Are you working on this issue?

Yes

Do you think this work might require an [Architectural Decision Record (ADR)]? (significant or noteworthy)

No

[waygeance]

Hi @jagpreetrahi, can you please look into this? I would be happy to raise a PR to solve this issue : )

[Relequestual]

I am not able to replicate this.
Have you tried in other browsers or is this a Brave browser only problem.
Tested on MacOS, Firefox and Chrome latest.

[waygeance]

Also in Chrome, I even cleared cahce but its still there, see under the Blog under Navbar

[waygeance]

Even in localhost this issue is there:

OS - Linux ubnutu

Google Chrome:

[Relequestual]

I can see your sreenshot, but I cannot replicate it... really weird.
Need to get someone else to validate or reject this.

[waygeance]

Yeah let's someone else validate this😊

[SakshamSinghal20]

@Relequestual same goes with me when i tried to test it was fine in my browser, @waygeance maybe it is your system issue.

[waygeance]

@SakshamSinghal20 I see, No worries I will try with my friends laptop and more browser to verify ✌🏻

[SakshamSinghal20]

okay no worries

[AgniveshChaubey]

I, too, am not able to replicate this on Windows. Possibly this is OS specific issue.

[waygeance]

Yeah its very strange behaviour 🤔