API v3 filters stop to work without any modification

API v3 filters stop to work without any modification

I have a service read data and self close some specific cases, but service stop to work in night
currently situation no reboot or os Patch or any updates on service desk praticaly no changing notthing .
but this night requests filters stop to working, other part of API works and response correctly ,same webgui no had any issue on other part of product ... but  when going to request that filter or other simple filter on requests like :
....api/v3/requests?input_data={"list_info":{"row_count":1,"start_index":"+index+","sort_field":"subject","sort_order":"asc","get_total_count":true,"search_fields":{"subject":"Request build"},"filter_by":{"name":"Open_System"}}}

API  return with  HTTP ERROR 500

this night to reboot service desk service , any  other suggestion?

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