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Cell C19 (ENG-2592). Brave's un-hide walk counts an empty srcdoc and a style attribute containing // (without url() as third-party resources (content_cosmetic.ts:529-541), so those two banners stay hidden in Standard. The control, with no resource at all, is first-party and is un-hidden. Rules: ###AdBigBox, ###AdBottomLeader and ###AdBottomRight (EasyList, un-hideable tier).
Expectations are Brave's verdicts, stated in pages/cosmetic-fixtures.json (ENG-2592); until Brave is measured they are hypotheses. The status line mirrors the Standard expectation.