.ui-dialog-buttonpane missing on media select dialog

This issue is not reproducible in Drupal versions 10.4.x and 11.x. Verified it by adding entity reference media field in content type and paragraph. Attaching screenshots for reference. Also, I didn't get the point that this occurs in dev site and in live site it is working. Please let me know if there is any specific step to be followed other than the steps mentioned in the IS to reproduce this issue in vanilla Drupal setup.

I've tried to debug through this - the 'Insert selected' is added in MediaLibrarySelectForm.php
$form['actions']['submit']['#value'] = $this->t('Insert selected');

This seems to be a viewsForm field so more complex than a simple form.
The processing does a number of doBuildForm() in FormBuilder.php and at some point 'Insert selected' gets lost or relevant HTML not generated.

So any hints on tracking down would be helpful - code or config etc.

The dialog is related to a View: Media library Page (/admin/content/media-widget) - same layout etc. The action bar is missing from this also.
The action line is missing from the Views UI page as well!

A comparison of configsync directories between live and dev shows no differences

@jons this was an issue in drupal/gin:3.0.0-rc11 and fixed in rc12
Maybe you're using Gin too?

Linking the related issue in the Gin theme

Thanks for great help @wotts @idebr

It was the Sticky setting, ' Enable sticky action buttons', which was different on dev compared to live (I missed this in checking).
(In gin.settings.yml: sticky_action_buttons: true)

Switching this off makes the buttons appear again!

I'm on 3.0.0-rc13 so maybe the issue has come back.

Looking at Gin issue, if I set sticky on again and apply #29 then go to edit a node with a media field, the buttons appear on initial ('Add or select media') dialog, but disappear if you select a different directory and click Apply filters.

I'll add this to 3455080

Hi, I'm also seeing this with Drupal 10.2.10 and Gin 3.0.0-rc13, only when is enabled.