typoscript - slide through of content items based on the colPos

When using bootstrap_package dynamic content sliding for custom column positions (e.g. colPos = 9), content elements do not inherit/slide from parent pages even though the slide configuration is set and passed correctly to lib.dynamicContent.

Footer column works, but custom columns defined in custom page layouts appear to ignore the slide parameter. The Fluid template receives the expected values (slide = -1, colPos = 9), however no parent content is rendered.

This suggests that bootstrap_package dynamic content processing may only fully support predefined/default column configurations or requires additional TypoScript registration for custom colPos values.

Is that correct?