@xenia-test oof, yes, it does. The highlight for a linked post only framed the right-hand column. The author column and the date strip paint their own backgrounds over the outline, so you got a half-frame with one rounded corner.
The fix puts the outline on a layer above the whole post, so nothing can cover it. It also gives both columns a soft tint, with the Midnight glow in dark mode. It'll ship with the next update. :3