Magento 2 Data synchronizer

I’m using https://github.com/DivanteLtd/mage2vuestorefront to get products from Magento to our Elasticsearch vuestorefront database, after saving some amount of products (randon number to be honest - after 7,5k, 39k products) - elastic seems to stop saving data from mage2vs.

Is there any way to, for example, limit amount of queries during import? Or is it problem with elastic?

Logs show normal behaviour - importing every product successfully.