This is expected when you create a custom Breadcrumbs structure for the Post post type. That custom structure replaces the default post breadcrumb trail, so if you only select the post type and enable Hide current post, there is no category item left to render.
Use this setup in the Breadcrumbs element instead:
Enable Hide current post
Enable Show taxonomy
Set Taxonomy slug to category
Enable Show parent terms if you want the full category hierarchy
That should give you Home > Climate without showing the current post title.
Thank you for the advice. I followed your instructions, but the full path is still appearing. Tried both options for Show parent terms (enabled and disabled).