docs: Add a warning from my pain (#377)

bin16 · Akryum · commit bacbc0ec5810 · 2018-09-02T14:14:01.000+02:00
See issue: #375
diff --git a/docs/guide/apollo/pagination.md b/docs/guide/apollo/pagination.md
@@ -9,6 +9,8 @@ Use the `fetchMore()` method on a Smart Query to load more data.
 
 ::: warning
 Don't forget to include the `__typename` to the new result.
+
+Don't change the returned initial variables when using `variables()`, or data of list would be lost.
 :::
 
 Example:
