Page:
https://www-dev.greenpeace.org/norway/wp-admin/post.php?post=58611&action=edit

Description of the issue: When I add the timeline block on a page after
leaving and opening back, the editor page it's broken and not editable. We
have couple of campaigns that we want to use it (in like a month time), so
it will be absolutely amazing if someone can have look. Thanks!

https://drive.google.com/file/d/1c24GWDE-sc7PLg1BenY_5R63tIIBLyNN/view