npub10hqwqf2pz5cadxygvjd8lj4c2quffuuw34wjy7tp44k7u2htq7psmmc3xq (npub10hq…c3xq) Likely the brackets are drawn as character entities, but the browser has rendered them in the inspector (it does that). Since the content is generated by JS, I cannot see the raw source without listening to the data stream and meh.
But if those were entities, then totally valid HTML.
Just very problematic ARIA use and annoying UI.