[data grid] Initial state width does not work on grouped columns

[vmichailidisdev]

Steps to reproduce

Steps:

1. Open this link to the demo
2. Observe that the lastName column width is not affected by initialState.columns.dimensions.lastName

Current behavior

lastName column width is not affected by initialState.columns.dimensions.lastName when having grouped columns

Expected behavior

lastName column width should be affected by initialState.columns.dimensions.lastName when having grouped columns

Context

No response

Your environment

npx @mui/envinfo

  System:
    OS: Linux 6.8 Ubuntu 22.04.5 LTS 22.04.5 LTS (Jammy Jellyfish)
  Binaries:
    Node: 22.9.0 - ~/.nvm/versions/node/v22.9.0/bin/node
    npm: 10.8.3 - ~/.nvm/versions/node/v22.9.0/bin/npm
    pnpm: Not Found
  Browsers:
    Chrome: 131.0.6778.108
  npmPackages:
    @emotion/react: ^11.13.3 => 11.13.3 
    @emotion/styled: ^11.13.0 => 11.13.0 
    @mui/core-downloads-tracker:  6.1.7 
    @mui/icons-material: ^6.1.7 => 6.1.7 
    @mui/material: ^6.1.7 => 6.1.7 
    @mui/private-theming:  6.1.7 
    @mui/styled-engine:  6.1.7 
    @mui/system:  6.1.7 
    @mui/types:  7.2.19 
    @mui/utils:  6.1.7 
    @mui/x-data-grid:  7.22.2 
    @mui/x-data-grid-premium: ^7.18.0 => 7.22.2 
    @mui/x-data-grid-pro:  7.22.2 
    @mui/x-date-pickers:  7.22.2 
    @mui/x-date-pickers-pro: ^7.22.2 => 7.22.2 
    @mui/x-internals:  7.21.0 
    @mui/x-license:  7.21.0 
    @types/react: ^18.3.3 => 18.3.3 
    react: ^18.3.1 => 18.3.1 
    react-dom: ^18.3.1 => 18.3.1 
    typescript: ^5.5.4 => 5.5.4 

Search keywords: grouped columns, initial width

Order ID: 94505

[michelengelen]

Hey @vmichailidisdev ... it works for me ... is this happening only in your app? or in the sandbox as well?

[github-actions]

This issue has been closed. If you have a similar problem but not exactly the same, please open a new issue.
Now, if you have additional information related to this issue or things that could help future readers, feel free to leave a comment.

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