I am using the core block editor/gutenberg in WP 5.2 (I’d have to be with using ACF Blocks, but I’m not using the bleeding edge Gutenberg plugin).
These are the WordPress theming concept of a Page Template.
This doesn’t happen with all Field Groups applied to a certain Page (for instance I have a field group applied to the Home page and it works as expected). Furthermore, this Field Group displayed in the editor as expected up until the full 5.8 release (or it might’ve been the last RC).
