Adding failing suspense test

dev/tests/suspence.tsx

@@ -0,0 +1,68 @@
+import { Suspense, useEffect, useState } from "react"
+import { motion } from "framer-motion"
+
+const SuspenseTest = ({ shouldSuspend }: { shouldSuspend: boolean }) => {
+    const [promise, setPromise] = useState<null | Promise<void>>(null)
+
+    useEffect(() => {
+        let timeoutId = setTimeout(() => {
+            setPromise(
+                new Promise((resolve) => {
+                    timeoutId = setTimeout(() => {
+                        resolve()
+                        setPromise(null)
+                        timeoutId = null
+                    }, 1000)
+                })
+            )
+        }, 1000)
+
+        return () => {
+            if (timeoutId != null) {
+                clearTimeout(timeoutId)
+            }
+        }
+    }, [])
+
+    if (promise && shouldSuspend) {
+        throw promise
+    }
+
+    return (
+        <motion.div
+            style={{ fontWeight: "bold", display: "inline-block" }}
+            initial={{ opacity: 0.2, scale: 1 }}
+            animate={{ opacity: 1, scale: 2 }}
+            transition={{ duration: 2 }}
+        >
+            {shouldSuspend ? "With suspense" : "Without suspense"}
+        </motion.div>
+    )
+}
+
+export function App() {
+    const [count, setCount] = useState(0)
+
+    return (
+        <>
+            <button onClick={() => setCount((count) => count + 1)}>
+                Re-mount components
+            </button>
+            <div key={count} style={{ width: 300, margin: "100px auto" }}>
+                <div style={{ marginBottom: 24 }}>
+                    <Suspense fallback={<div>Suspended</div>}>
+                        <SuspenseTest shouldSuspend={true} />
+                    </Suspense>
+                </div>
+                {/* <SuspenseTest shouldSuspend={false} /> */}
+            </div>
+            <p>
+                The above animation is the same for both components. One
+                suspends halfway through and the other does not. Click "Re-mount
+                components" to run the animations again. Notice how the scale
+                animation is stuck half way and the opacity animation is reset
+                in the suspended component.
+            </p>
+        </>
+    )
+}