[data grid] Scroll jumping in Firefox 141

[michaeldaudiolo]

Steps to reproduce

Steps:

1. Open this link to live example in Firefox (at least version 141, not sure about previous versions): https://stackblitz.com/edit/y9stnxbw-rj7v8zne
2. Try to scroll through the data grid using the scroll wheel
3. Observe the scroll position jumping back up when approaching a grouped row

It doesn't seem to happen with disableVirtualization or while using Google Chrome.

Screencast_20250801_135451.webm

Current behavior

Very hard to scroll all the way to the bottom, the scroll position jumps back up.

Expected behavior

Scrolling should be smooth.

Context

No response

Your environment

npx @mui/envinfo

  Don't forget to mention which browser you used.
  Output from `npx @mui/envinfo` goes here.

Search keywords: tree data firefox

[Andyuu]

I also have this issue on Firefox 141 on Linux.

I have confirmed this issue does not happen in version 8.9.1 but does in 8.9.2.

[MBilalShafi]

I can reproduce the issue, seems to be a side effect of #18275.
I'll move this to the board for the team to have a look.

CC @romgrk

[romgrk]

Unrelated to treedata, the issue is present event with a regular dataset with the community version of the datagrid.

[romgrk]

I haven't been able to find the cause of the scroll jumps, I'll try to bisect the branch next week to find which commit introduced it.

[Simencas]

Similar issue in Chrome as well:

Screen.Recording.2025-08-09.at.13.05.53.mov