Blue inserter line does not appear before first block or after last block

[aaronjbaptiste]

Description

When trying to drag a block before the first or last in a list no blue inserter line is visible, even though the drop/move is applied.

This applies to both the root container and other containers such as horizontal orientation column layouts.

This was previously reported here #32880 and I believe fixed in #33024, but has possible regressed.

It's particularly troublesome on Gutenberg's implementation on Tumblr when managing image layouts.

Step-by-step reproduction instructions

1. Create three paragraph blocks - Item A, Item B, Item C.
2. Try to drag item B above item A - notice there's no blue indicator line.
3. Try to drag item B below item C - also no indicator.

Screenshots, screen recording, code snippet

On Wordpress:

On Tumblr:

Horizontal containers on Tumblr:

Environment info

Mac OS 12.4
Chrome 103.0.5060.134

Wordpress:
Gutenberg: v13.8.1
Editing Toolkit: 3.38921
WP AMP: 2.0.5
CoBlocks: 2.18.1-simple-rev.2

Please confirm that you have searched existing issues in the repo.

Yes

Please confirm that you have tested with all plugins deactivated except Gutenberg.

Yes

[talldan]

Thanks for reporting. This has already been reported in #32880, so I'll close this one as a duplicate.

[talldan]

This was previously reported here #32880 and I believe fixed in #33024, but has possible regressed.

Just read this. I think it's fine to still use #32880 and leave a comment on there mentioning it has regressed.

[talldan]

Issue should be fixed as of #43135