diff --git a/src/core/vdom/helpers/normalize-scoped-slots.js b/src/core/vdom/helpers/normalize-scoped-slots.js
index 1e43fd393f7..2d74e4c13b5 100644
--- a/src/core/vdom/helpers/normalize-scoped-slots.js
+++ b/src/core/vdom/helpers/normalize-scoped-slots.js
@@ -62,7 +62,7 @@ function normalizeScopedSlot(normalSlots, key, fn) {
       : normalizeChildren(res)
     return res && (
       res.length === 0 ||
-      (res.length === 1 && res[0].isComment) // #9658
+      (res.length === 1 && res[0].isComment && !isAsyncPlaceholder(res[0])) // #9658, #10391
     ) ? undefined
       : res
   }