React 18 doesn't wait for long running suspended promises

At Shopify with Hydrogen, we are encountering a problem with long running requests and React Server Components. If a component within a suspense boundary makes a request to blackhole.webpagetest.org, `pipeToNodeWritable` doesn't stay open while the promise to blackhole is suspended. Steps: 1. Request from the client 2. Server starts `pipeToNodeWritable` 3. One component in the tree makes a request to blackhole, which won't ever resolve (node-fetch eventually times out). 4. React almost immediately calls `onCompleteAll`, even though the underlying promise has yet to resolve. 5. `onError` is never called either 6. This error is in the server console: `Warning: There was still abortable task at the root when we closed. This is a bug in React.` Eventually the error from the request does timeout, and it shows up in the console, but it's too late to stream anything to the client because the response has been closed. But even catching that error is hard/difficult, because. it is just dumped to the console, and doesn't actually go through React's `pipeToNodeWritable` `onError` handler. See the example here: https://stackblitz.com/edit/hydrogen-v3w1xm?file=src%2Fpages%2FIndex.server.jsx Note in Index.server.jsx:73 it's fetching data to blackhole. Note the warnings in the console: > Warning: There was still abortable task at the root when we closed. This is a bug in React.