Reproduction link

Minimal snippet below (no CodeSandbox — the behavior is reproducible in any React app).

Steps to reproduce

Render XMarkdown in streaming mode (streaming.hasNextChunk = true) with an incompleteMarkdownComponentMap that maps link to a placeholder component, then feed it a still-incomplete link (closing ) not yet arrived).

import XMarkdown, {type ComponentProps} from '@ant-design/x-markdown';

const streaming = {
  hasNextChunk: true,
  incompleteMarkdownComponentMap: {link: 'incomplete-link'},
};

const components = {
  'incomplete-link': (props: ComponentProps) => {
    const raw = decodeURIComponent(String(props['data-raw'] || ''));
    const label = raw.match(/^\[([^\]]*)\]/)?.[1] ?? raw.slice(1);
    return <a href="#">{label}</a>;
  },
};

// (A) Incomplete link in a paragraph — works as documented.
<XMarkdown components={components} streaming={streaming}>
  {'See [some label](https://exa'}
</XMarkdown>

// (B) The same incomplete link as a list item — broken.
<XMarkdown components={components} streaming={streaming}>
  {'- [some label](https://exa'}
</XMarkdown>

Current behavior

• (A) renders the incomplete-link placeholder: <a>some label</a>. ✅
• (B) renders the raw markdown as text — - [some label](https://exa — with the URL fragment turned into an autolink, and the placeholder is never used. ❌

The placeholder only starts working for (B) once the closing ) streams in and the link becomes complete. Because the incomplete state is shown as raw markdown and the complete state as a rendered link, the visible text noticeably changes width (it shrinks) at the moment the link completes — a distracting layout shift in a streaming UI.

The trigger is specifically an incomplete link whose [ immediately follows an unordered list marker (- , * , + ). An incomplete link elsewhere — in a paragraph, or later within the same list item (e.g. - see [some label](https://exa) — is recognized correctly and gets the placeholder. Ordered-list markers (1. ) are also fine. The same raw-rendering happens for incomplete images (![...]() directly after a list marker.

Expected behavior

An incomplete link directly after a list marker should be recognized as an incomplete link and rendered via incompleteMarkdownComponentMap / incomplete-link, the same as in a paragraph — so it doesn't flash as raw markdown and shift layout when it completes.

Version

• @ant-design/x-markdown: 2.3.0 (the responsible streaming-recognizer code path appears unchanged through the current 2.8.0)
• React: 19
• Reproduced in both a browser and jsdom.