I am having this issue as well, only in regards to the Customers list. When I go to WooCommerce > Customers and click on the “Download” button with the cloud, it says the report will be emailed. That email never comes. When I go to /wp-content/uploads/ the csv file only has 50 users (rather than the full 103).
I only need the list of Customers because we are trying to see the discrepancy between the list of WordPress Users with a user role of “Customer” and the WooCommerce Customers list. THAT is an issue for another thread.