Summary

The issue is that React's ViewTransition API is triggered by `startTransition` calls originating from within a component (Streamdown's blocks), causing unintended transitions during streaming updates. The goal is to find a way to prevent these internal `startTransition` calls from initiating ViewTransitions, or to provide a mechanism to explicitly control when ViewTransitions occur.

Skills Required

Files Likely Touched

• packages/react-dom/src/server/ReactDOMLegacyBatching.js
• packages/react-dom/src/client/ReactDOMRoot.js
• packages/react-reconciler/src/ReactFiberTransition.js
• packages/shared/ReactFeatureFlags.js

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