Cast dashboard - Issue with max_columns in sections

[Ladida1]

Checklist

• I have updated to the latest available Home Assistant version.
• I have cleared the cache of my browser.
• I have tried a different browser to see if it is related to my browser.
• I have tried reproducing the issue in safe mode to rule out problems with unsupported custom resources.

Describe the issue you are experiencing

Hi,

I hope this is the right place to report this. I'm a bit unsure if this is a bug or the intended way how the dashboard should be displayed when casting. Anyway it is a change in behavior compared to versions earlier than HA 12.0.

When I'm castin a dashboard to a Google Nest Hub the setting max_columns is not respected.
These are test dasboards I create to illustrate the problem.

Sections view with 2 sections:
This looks as expected.

• type: sections
  max_columns: 2
  title: Test 2 sections
  path: test-2-sections
  icon: mdi:format-columns
  sections:
  • type: grid
    cards:
    • type: heading
      heading: Ny sektion
    • type: entities
      entities:
      • entity: light.kok
      • entity: light.koksbord
      • entity: light.soffbelysning
  • type: grid
    cards:
    • type: heading
      heading: Ny sektion
    • type: media-control
      entity: media_player.kd_55xe8096_2

Sections view with 3 sections:
Here the three sections are shown side by side. I expected the 3rd section to appear below the first section.

• type: sections
  max_columns: 2
  path: test-3-sections
  icon: mdi:format-columns
  title: test-3-sections
  sections:
  • type: grid
    cards:
    • type: heading
      heading: Ny sektion
    • type: entities
      entities:
      • entity: light.kok
      • entity: light.koksbord
      • entity: light.soffbelysning
  • type: grid
    cards:
    • type: heading
      heading: Ny sektion
    • type: media-control
      entity: media_player.kd_55xe8096_2
  • type: grid
    cards:
    • type: heading
      heading: Ny sektion
    • type: entity
      grid_options:
      columns: 12
      rows: 2
      entity: binary_sensor.diskmaskin

Describe the behavior you expected

Here is a view from before 12.0 where the view contains 4 sections and the max_columns=2 is respected. The last section with the "Back" button has a colspan to take up the full width.

Steps to reproduce the issue

1. Create a dashboard with 3 sections
2. Use max_columns=2
3. Cast to a Google Nest Hub
   ...

What version of Home Assistant Core has the issue?

2025.12.3

What was the last working version of Home Assistant Core?

2025.11.3

In which browser are you experiencing the issue?

Google Nest Hub (Gen2)

Which operating system are you using to run this browser?

Google Nest Hub (Gen2)

State of relevant entities

Problem-relevant frontend configuration

JavaScript errors shown in your browser console/inspector

Additional information

No response

[github-actions]

There hasn't been any activity on this issue recently. Due to the high number of incoming GitHub notifications, we have to clean some of the old issues, as many of them have already been resolved with the latest updates.
Please make sure to update to the latest Home Assistant version and check if that solves the issue. Let us know if that works for you by adding a comment 👍
This issue has now been marked as stale and will be closed if no further activity occurs. Thank you for your contributions.

[Ladida1]

This is still an issue after 2026.3.3 release.

[github-actions]

There hasn't been any activity on this issue recently. Due to the high number of incoming GitHub notifications, we have to clean some of the old issues, as many of them have already been resolved with the latest updates.
Please make sure to update to the latest Home Assistant version and check if that solves the issue. Let us know if that works for you by adding a comment 👍
This issue has now been marked as stale and will be closed if no further activity occurs. Thank you for your contributions.