[Bug]: Combo Box Free Form Popup doesn't Scroll Correctly

[LauraAlspaugh]

Component

Combobox

Package version

9.72.3

React version

18.3.1

Environment

System:
    OS: Windows 11 10.0.26100
    CPU: (24) x64 13th Gen Intel(R) Core(TM) i7-13700K
    Memory: 21.91 GB / 63.71 GB
  Browsers:
    Chrome: 144.0.7559.96
    Edge: Chromium (140.0.3485.66)
    Firefox: 144.0 - C:\Program Files\Mozilla Firefox\firefox.exe
    Internet Explorer: 11.0.26100.7309
  npmPackages:
    @fluentui/react: 8.124.0 => 8.124.0
    @fluentui/react-components: ^9.72.3 => 9.72.3
    @fluentui/react-icons: ^2.0.307 => 2.0.313
    @fluentui/react-northstar: 0.66.5 => 0.66.5
    @types/react: ^18.3.1 => 18.3.26
    @types/react-dom: ^18.3.1 => 18.3.7
    react: 18.3.1 => 18.3.1
    react-dom: 18.3.1 => 18.3.1

Current Behavior

When the combo box is set to freeform, typing in a long value creates a weird and jumpy horizontal scroll behavior when trying to view that value from the list-box. Trying to scroll to the right, causes the scroll bar to jump back to its original position.
I wasn’t able to reproduce this issue in a Code Sandbox or the Fluent example sandboxes. The bug occurs only in my project.

Expected Behavior

As seen in the docs example, scrolling to the right in the list-box should behave as a regular scrollbar does, and allow the user to view all of the content.

Reproduction

https://landiscomputer-my.sharepoint.com/:v:/g/personal/laura_landistechnologies_com/IQCF_vTNIf-mT6nE9zypPE4SAYpR3H5MDkB4AcmBUkjp3Zg?e=GfC5FW

Steps to reproduce

1. In the combo box, type in a long value so that the dropdown scrolls.
2. Open the dropdown, and try viewing the value.
3. Scrolling to the right, causes the scrollbar to jump horizontally.

Are you reporting an Accessibility issue?

None

Suggested severity

High - No 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.

[dmytrokirpa]

@LauraAlspaugh Could you please provide a repro on StackBlitz/CodeSandbox or fork this one, as I'm not able to reproduce the issue. It might be browser/OS specific thought

Screen.Recording.2026-01-27.at.21.45.05.mov

[AdyaTech]

Hello! I want to contribute to this project but cannot find a way. Can someone please guide me so that I don't end up writing code in someone else's file.

This would help me a lot.

[dmytrokirpa]

Hello! I want to contribute to this project but cannot find a way. Can someone please guide me so that I don't end up writing code in someone else's file.

This would help me a lot.

We appreciate all contributions. @AdyaTech, do you have a particular issue you'd like help with, or are you seeking general guidance on getting started with the monorepo?

[AdyaTech]

Hi @dmytrokirpa!

I was interested in the Combo Box Form Popup issue (#35701) but didn't know how to contribute my code. However I have tried attempting and submitted the code within a folder (Fixed-Issues) in the src directory. Please let me know if I can improve somehow as I am a first time contributor.

[dmytrokirpa]

Hi @AdyaTech, are you referring to this PR #35705 as a solution for the issue? If so, it won't resolve the problem, since the issue concerns the existing Combobox component in @fluentui/react-components. There's no need to create a new one or take the approach you mentioned.

To move forward, we first need a standalone reproduction of the issue (preferably on Stackblitz) as shown in the attached recording. After that, we can discuss the root cause and potential solutions.

[AdyaTech]

Oh okay. Thanks @dmytrokirpa for the help!