Api returning UNEXPECTED_INTERNAL_API_ERROR when mutating BudgetOrderService

Hi all,

I use the AdWords API v201607 and I use a MCC account to manage many customer AdWords accounts and budgets.

The MCC account is whitelisted to use BudgetOrderService.

The issue is :

I mutate an ADD operation with ManagedCustomerService to create a new ManagedCustomer.

Right after, I mutate an ADD operation with BudgetOrderService to add a BudgetOrder at the new ManagedCustomer but the mutate operation fail with this error : UNEXPECTED_INTERNAL_API_ERROR

But If I restart the process, the ManagedCustomer already exists and only the ADD operation with BudgetOrderService is executed without any errors.

Is there a delay before to use a recently created ManagedCustomer? Or is it an other problem?

Thank you for your help!

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