We have a set of Opti Forms that are multi step. At the end of the data collection process we're using a form actor to shunt the data off to a service which is transforming the data and uploading it to a client endpoint. 

We have a problem in that "sometimes" the data is incomplete - so even though their is validation on fields, and the forms can't be finished without values for certain fields, when it ends up at the client endpoint, the fields that should have user data are empty. This happens around 10% of the time. And the fields that are empty are not always the same ones. Sometimes we have all data come through fine, sometimes its 8 fields of 15 come through fine, sometimes its 5 - there seems to be no method to the madness. Due to the nature of the data we can't store is locally or mail it anywhere.

We're using Opti 11, and Forms 4.31.0, and the environment is load balanced across two front end servers.

Does anyone have ANY CLUE what might be happening?