fix(runtime-core): fix child node unloading in v-for

Author: Alfred-Skyblue

packages/runtime-core/src/renderer.ts

@@ -2119,8 +2119,9 @@ function baseCreateRenderer(
       } else if (
         dynamicChildren &&
         // #1153: fast path should not be taken for non-stable (v-for) fragments
-        (type !== Fragment ||
-          (patchFlag > 0 && patchFlag & PatchFlags.STABLE_FRAGMENT))
+        type !== Fragment &&
+        patchFlag > 0 &&
+        patchFlag & PatchFlags.STABLE_FRAGMENT
       ) {
         // fast path for block nodes: only need to unmount dynamic children.
         unmountChildren(