Get fax entries via web API

We have FaxFinder® Fax Server FF840.Rx / Firmware 5.0.5.1.

My application uses web API to request list of fax entries using URL:

https://192.168.16.1/ffws/v1/ofax?complete_limit=100&all_users=false&include_modem_info=false&class=complete

Ir worked OK but now returns only 3 entries. Via web interface I see 800+ entries at the Outbound Fax Log.

What can be wrong?