fix(hmr): ensure unregisterHMR is called to avoid stale instances during reload

Author: edison1105

packages/runtime-core/src/hmr.ts

@@ -172,6 +172,8 @@ function reload(id: string, newComp: HMRComponent): void {
           isHmrUpdating = true
           const parent = instance.parent! as ComponentInternalInstance
           if (parent.vapor) {
+            // ensure unregisterHMR is called to avoid stale instances
+            instance.scope.stop()
             parent.hmrRerender!()
           } else {
             if (!(parent.effect.flags! & EffectFlags.STOP)) {

packages/runtime-vapor/src/hmr.ts

@@ -38,6 +38,7 @@ export function hmrReload(
 ): void {
   // if parent is KeepAlive, we need to rerender it
   if (instance.parent && isKeepAlive(instance.parent)) {
+    instance.scope.stop()
     instance.parent.hmrRerender!()
     return
   }