I’m having exactly the same problem. I have two post types: Post and Blog. The Post is renamed to News but it doesn’t affect because I have tried also without the renaming.
If I’ll try to add both of those post types to the filter, only the Post post type is shown. If I try the Blog post type alone or with some other combination of post types (Media) it works correctly.
I have the latest ACF installed (5.2.5)