That’s ok, I will stay with my solution. But many people have this problem. I googled to find the solution.
I’d like a better solution. What I can say is the page layout settings “hide both” don’t work in WordPress 5.0. So, you need to find out why and recommend a solution. It’s normal that a new release breaks things but I would suggest that your developers take a look at this.
I used the customizer to add css to hide the breadcrumbs. It turns out that the breadcrumb container (p tag) had an ID so it was easy to target with a “display: none;”.With this css addition I don’t have any breadcrumbs on any of my pages.
Everything was working fine for a few years. The breadcrumbs suddenly appeared when we upgraded to WordPress 5.0. The title bar settings in layout is set to “hide both” for pages. The website is https://www.powerdigitalsignage.com. I can give you temporary access to our wordpress admin if this would help.