Best Script for MODIS NDVI

Hey there, we’re integrating the MODIS Satellite in our platform, but we’re facing strange indexes results.

Beetween Oct 17 until Jan 18 there is a lot of zero-index values that sounds a little strange.

Here is a comparison between Modis and Sentinel

This is the script we’re based to use in our instance.

https://custom-scripts.sentinel-hub.com/custom-scripts/modis/indexdb/id_245.js

Is there another script or any recommendation to use MODIS index ?

Thanks.