[bug] After update 3.1.1 => 3.1.2: Container children not rendered when using content slide

[thomasrawiel]

Probably related to #581 and/ or #582

We have a FLUIDTEMPLATE with a content column that has slide activated

 relatedContent = CONTENT
       relatedContent {
      table = tt_content
      select {
          where = colPos = 5
           orderBy = sorting
      }
      slide = -1
 }

A page has a container in that column, the subpages should inherit that container

After the update, the children are missing on subpages that render the container from the parent page.

The container itself is inherited, but the children are lost.
Although we use a custom ContainerProcessor, I also tested this with EXT:container's shipped processor:

tt_content.row-related =< lib.containerElement
tt_content.row-related {
    templateName = RowRelated
    dataProcessing {

        90 = B13\Container\DataProcessing\ContainerProcessor
        90 {
            colPos = 100
            as = children_100_default
        }

        100 = MyVendor\MyExt\Frontend\DataProcessing\ContainerGalleryProcessor
        100 {
            colPos = 100
            as = children_100_custom

            elementsPerRow = {$plugin.myext.settings.content.row--related.elementsPerRow}
            gridRowClasses {
                100 =
                50 = grid-row-50
                33 = grid-row-33
                25 = grid-row-25
            }
        }
    }
}

Here's an f:debug of {_all} in the container template

before:

after:

Pinning EXT:container to 3.1.1 is a workaround

[thomasrawiel]

To add:
TYPO3 v12.4.26
EXT:container 3.1.2
php 8.3.16

No workspaces

[Patta]

I can confirm this issue/regression in v3.1.2 with TYPO3 12.3.26 and PHP 8.3.16.
The container content element is added with shortcut (insert records) plugin. Container is rendered, child elements are missing.

[thomasrawiel]

Update to 3.1.3 resolves the issue, thanks a lot! @achimfritz