No employee id in response?

Every so often (1 out of 20 times) when i make a request to create an employee:
POST /employees

I get a response with no id property.

From what i can see, when that happens the custom property comes back with a giant list.
I tried sending custom as an empty array, but this still happens sporadically.

These are the properties i'm sending in the request: password, fname, lname, email, phone_number, notes, city, state, status.

This happens again just like 5 mins ago, and i can provide the email i sent if that helps you track down the request.