Hello Ramanajee,
Could you please confirm if you're seeing this issue for any specific service? Are you receiving any error when the API call failed? If you could share the complete request and response logs, we will be able to take a closer look. You may share the details privately via Reply privately to author option.
Regards,
Bharani, Google Ads API Team

ref:_00D1U1174p._5001UBl8Oh:ref