Issue Overview

Gutenberg showing an error after post was saved / updated correctly, when is in content a shortcode.

Steps to Reproduce (for bugs)

1. Video, where I am showing it - https://www.youtube.com/watch?v=lqNu__J4sHM

Expected Behavior

Will not show an error.

Current Behavior

Showing an error.

Topic in WordPress plugin plage - https://wordpress.org/support/topic/shortcode-in-block-fail-to-save-post/