Site Pages showing as Page Template - Cannot publish major version

Does anyone know the fix for this weird bug. A bunch of our site pages in Modern SharePoint started showing "This is a page template saved on your site.Learn more." green bar at the top of the site page even though they are not templates, they cannot be found in the templates folder and be used as a template.

It just started a recently. All of these pages didn't have that issue before and it affects multiple other site collections. We have no idea how to fix it and Microsoft Premium support has been unhelpful so far. We didn't change any configuration, when creating a new page it creates it correctly, It seems to only affect existing pages (even from 2 years ago) . 

This is an issue because we can't publish a major version because it only lets us save it as a template. (ie. just as minor versions).