PreloadQuery render-prop + useReadQuery throws "uncached promise" on Next 16 / React 19 / AC 4.1.9

Issue Description

Following the documented PreloadQuery + useReadQuery pattern (render-prop, passing queryRef to a Client Component), React throws:

Warning: A component was suspended by an uncached promise. Creating promises inside a Client Component or hook is not yet supported, except via a Suspense-compatible library or framework.

The Suspense fallback also flashes on initial render. Replacing useReadQuery with useSuspenseQuery (the alternative pattern in the README) works correctly.

Versions

• next: 16.1.7
• react: 19.2.4
• react-dom: 19.2.4
• @apollo/client: 4.1.9
• @apollo/client-integration-nextjs: 0.14.5
• @apollo/client-react-streaming: 0.14.5 (transitive, single instance)

npm ls @apollo/client shows a single deduped instance — no duplicate installations.

Reproduction

Server Component (app/page.tsx)

<PreloadQuery query={QUERY} variables={{ currentPage: 1 }}>
  {(queryRef) => (
    <Suspense fallback={<>loading</>}>
      <ChildClient queryRef={queryRef} />
    </Suspense>
  )}
</PreloadQuery>

"use client"
import { useReadQuery, useQueryRefHandlers } from "@apollo/client/react"
import { useWrapTransportedQueryRef } from "@apollo/client-react-streaming"

export function ChildClient({ queryRef }) {
  const wrappedRef = useWrapTransportedQueryRef(queryRef)   // tried with and without this
  const { data } = useReadQuery(wrappedRef)
  const { fetchMore } = useQueryRefHandlers(wrappedRef)
  // ...
}

Start with the app/page.tsx PreloadQuery example and the ChildClient component shown in the issue, using the listed Next.js, React, and Apollo versions. Compare the render-prop/useReadQuery path with the working useSuspenseQuery alternative and reproduce the uncached-promise warning; done means the documented pattern renders without the warning or initial Suspense fallback flash.