Merge pull request #37261 from dukenv0307/fix/37253-console-error-show-up

Fix/37253: Console log error when opening thread

(cherry picked from commit a13a69d)

Author: techievivek

src/components/FlatList/MVCPFlatList.js

@@ -38,6 +38,7 @@ const MVCPFlatList = React.forwardRef(({maintainVisibleContentPosition, horizont
     const firstVisibleViewRef = React.useRef(null);
     const mutationObserverRef = React.useRef(null);
     const lastScrollOffsetRef = React.useRef(0);
+    const isListRenderedRef = React.useRef(false);
 
     const getScrollOffset = React.useCallback(() => {
         if (scrollRef.current == null) {
@@ -137,6 +138,9 @@ const MVCPFlatList = React.forwardRef(({maintainVisibleContentPosition, horizont
     }, [adjustForMaintainVisibleContentPosition, getContentView, getScrollOffset, scrollToOffset]);
 
     React.useEffect(() => {
+        if (!isListRenderedRef.current) {
+            return;
+        }
         requestAnimationFrame(() => {
             prepareForMaintainVisibleContentPosition();
             setupMutationObserver();
@@ -186,6 +190,10 @@ const MVCPFlatList = React.forwardRef(({maintainVisibleContentPosition, horizont
             onScroll={onScrollInternal}
             scrollEventThrottle={1}
             ref={onRef}
+            onLayout={(e) => {
+                isListRenderedRef.current = true;
+                props.onLayout?.(e);
+            }}
         />
     );
 });