onEndReached fires multiple times when using initialScrollIndex

[naqvitalha]

Bug Report

When using FlashList with initialScrollIndex set, the onEndReached callback fires multiple times during the initial render, even though the user hasn't scrolled at all.

Steps to Reproduce

1. Create a FlashList with initialScrollIndex={50} and onEndReached callback
2. Observe that onEndReached fires 2-3 times immediately on mount
3. This causes unnecessary data fetching

Expected Behavior

onEndReached should only fire when the user actually scrolls near the end of the list, not during the initial scroll position setup.

Environment

• flash-list: 2.3.0
• react-native: 0.84.1
• Platform: iOS 18, Android 14