elastic: eliminate react warning (#52934)

public/app/plugins/datasource/elasticsearch/components/QueryEditor/ElasticsearchQueryContext.tsx

@@ -1,4 +1,4 @@
-import React, { Context, createContext, PropsWithChildren, useCallback, useContext } from 'react';
+import React, { Context, createContext, PropsWithChildren, useCallback, useContext, useEffect } from 'react';
 
 import { TimeRange } from '@grafana/data';
 
@@ -52,11 +52,18 @@ export const ElasticsearchProvider = ({
     reducer
   );
 
+  const isUninitialized = !query.metrics || !query.bucketAggs || query.query === undefined;
+
   // This initializes the query by dispatching an init action to each reducer.
   // useStatelessReducer will then call `onChange` with the newly generated query
-  if (!query.metrics || !query.bucketAggs || query.query === undefined) {
-    dispatch(initQuery());
 
+  useEffect(() => {
+    if (isUninitialized) {
+      dispatch(initQuery());
+    }
+  });
+
+  if (isUninitialized) {
     return null;
   }