After Adding large data alphabet list is not working as per index selection

[dhairyasenjaliya]

Expected Behavior

After adding more than 2000 data list should show data as per letter selected

Actual Behavior

After adding more than 2000 data into the
list it started breaking when we press letter after 'C' it shows blank no data

Steps to Reproduce the Problem

1.Add data more than 200

Any sort of help is really appreciated
@dheysonalves can you please take a note as this package is really help full but this issue gets me stuck

[Veervijay38]

I am also having the same problem, please help!

[rohitsk14]

I fixed it by adding these performance related props
getItemLayout={...} maxToRenderPerBatch={20} updateCellsBatchingPeriod={25} initialNumToRender={20} windowSize={41}

for reference https://reactnative.dev/docs/0.63/optimizing-flatlist-configuration

[Umar-Farooq-Shafi]

@rohitsk14 If I add pagination, the alphabet click does not work correctly. For example, clicking on "M" takes me to "N", etc.