Summary not working with columns

[slimmilkduds]

Describe the bug
When using the columns block, heading blocks aren't identified and the summary block doesn't show anything.

To Reproduce
Steps to reproduce the behavior:

1. create a post with 2 columns
2. Add a couple of headings inside the columns
3. click on "content structure"
4. click "insert summary"

Expected behavior
I expect the summary to show the same content structure as I get when I press the "content structure" icon. Instead it says "Your current post/page has no headings. Try add some headings and update this block later"

Desktop (please complete the following information):

• OS: macOS High Sierra
• Browser: Chrome
• Version 67.0.3396.99

Additional context

• Gutenberg version 3.4

[earnjam]

Hi @slimmilkduds thanks for reporting this.

The Content Summary block is something from the Advanced Gutenberg plugin. You should report this to the support forum for that plugin, as it's not an included core block at this time.

See #7115, #1760, #2871 for more information.

[slimmilkduds]

Whoops. I totally missed that, thanks!