[Bug]: Selected NavSubItem shows no indicator inside expanded NavCategory

Component

Nav (Preview)

Package version

9.74.7

React version

19.3.0

Environment

System:
  OS: Windows 11 10.0.26200
  CPU: (20) x64 Intel(R) Core(TM) Ultra 7 265HX
  Memory: 8.44 GB / 31.68 GB
Browsers:
  Edge: Chromium (152.0.4191.53)
npmPackages:
  @fluentui/react-components: ^9.74.7 => 9.74.7 
  @fluentui/react-icons: ^2.0.339 => 2.0.340 
  @types/react: ^19.2.18 => 19.3.0 
  @types/react-dom: ^19.2.4 => 19.3.0 
  react: ^19.2.8 => 19.3.0 
  react-dom: ^19.2.8 => 19.3.0

Current Behavior

When a NavSubItem inside an expanded NavCategory is selected (selectedValue matches its value), its selection indicator is not visible.

The indicator pseudo-element (::after) is positioned with inset-inline-start: 46px and margin-inline-start: -52px, i.e. 6 px outside the item's box.

Expected Behavior

A selected NavSubItem shows its selection indicator while its category is expanded, aligned with the indicators of top-level NavItems.

Reproduction

https://stackblitz.com/edit/drvr8jcg?file=src%2Fexample.tsx

Steps to reproduce

1. Open "Job Postings"
2. Click on "Openings"

Are you reporting an Accessibility issue?

No response

Suggested severity

Medium - Has workaround

Products/sites affected

No response

Are you willing to submit a PR to fix?

no

Validations

• Check that there isn't already an issue that reports the same bug to avoid creating a duplicate.
• The provided reproduction is a minimal reproducible example of the bug.