Can't add more than 1 post to a section

[xLesy]

Describe the bug

After updating to 1.2.2 each section can only hold up to 1 post.
Before this update I was using @bmarshall511 1.2.2 from #22 (added images to export) which works fine. Reverting back to it, fixes the issue. Also works fine on classic 1.2.1.

I'm not sure if this is related to Cypress or not, so I made a seperate post.

Steps to Reproduce

1. Create new publication or open exiting one
2. Create a section
3. Add 2 posts and save
4. Only 1 post remains

Screenshots, screen recording, code snippet

No response

Environment information

WP 6.3.1
PHP 8.0.30
Apache
Theme: Newspaper 12.5.1

WordPress information

No response

Code of Conduct

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