Because the block attributes are updated in render, opening a post which has a take action boxout block will trigger a warning when you try to navigate away from the editor. This is contrary to the normal behavior where WP can detect no edits were made and the user doesn't get a prompt on closing unless the post has changes.

Instead the attributes should only get updated once the block is being manually updated. The attributes don't need to be updated because our code is written to handle content that was not updated yet. Updating them when you only open the post has no benefits, and only causes this UX blocking warning.