Barrier Blocks are not shown when "Show Invisible Blocks" is selected in Save Structure Blocks

If you place Barrier Blocks within a structure you are saving, and toggle on "Show Invisible Blocks" within the Save Structure Block,the Barrier Blocks are not displayed. They are blank.

This may be Working as Intended, but Barrier Blocks are invisible and should show up when "Show Invisible Blocks" is toggled on.