Yeah it’s a bug. But it comes from bootstrap 4 and it’s use of flexbox. Some elements in bootstrap create the extra padding below when they use display classes for layout. Try left aligning the image and the space will go away. The centering class from bootstrap that is applied to images by default also causes the white space. I found a bunch of scenarios that cause this on no padding Blocs all caused by the bootstrap layout classes.
Also, this is just my opinion but using an entire bloc just to add a divider is wasteful, that’s extra code bloat the browser reads that could be added with a class to apply a border on the lower bloc edge.
I’m working on a bunch of these issues right now so I’ll try to come up with a solution that doesn’t break other areas.