GET /servicedesk/{id}/customer returns fewer customers than the JSM Customers page shows

The Get customers API for our service desk returns far fewer customers than the Customers page in the JSM project. Endpoint used GET https://<>.atlassian.net/rest/servicedeskapi/servicedesk/36/customer?start=0&limit=50 What we see API response: size: [13] , isLastPage: true . There is no next page.