Dynamic item height causes items to overlap during fast scroll

[Jianlong-Nie]

Description

When using FlashList with dynamic item heights, quickly scrolling up/down causes content to jump, collapse, and overlap each other.

Steps to Reproduce

1. Render a FlashList with dynamic item heights (items have varying/unpredictable heights)
2. Scroll quickly up and down

Expected Behavior

Items maintain their correct heights and positions while scrolling.

Actual Behavior

Items jump, collapse, and overlap each other during fast scroll due to incorrect height estimations for dynamic items.

Platform

• iOS
• Android

FlashList Version

2.3.0

MicrosoftTeams-video.-.2026-01-29T172808.931.mp4

[naqvitalha]

Can you provide a sample where this can be reproduced? That will help us look into it.