Azure AI Document Intelligence
An Azure service that turns documents into usable data. Previously known as Azure Form Recognizer.
API calls changed behaviour in Parallel situations
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userWithQuestion
20
Reputation points
I am using Document Intelligence with a custom extraction model to extract (and later process) data from multi page PDFs. A durable function is orchestrating an activity function and adding a task for every page of these PDFs (using the uri and adding the page to extract via AnalyzeDocumentOptions) and using await Task.WhenAll(tasks); to execute them in paralell.
In the past, this would result in every API call returning the contents of the requested page.
As of a few days ago however, the calls are all returning the same results of the same page. I have rolled my codebase back to the lastest point where it was confirmed working and the changed behaviour persisted.
Has there been an active change to the serive/API or is this a bug?
Azure AI Document Intelligence
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userWithQuestion 20 Reputation points
2025-12-15T22:00:27.9566667+00:00 After checking the logs, the issue started somewhere between 15.December 09:52UTC and 10:09UTC on weu hosted infrastructure.
The behaviour is also not limited to parallel execution and consistent across different resource groups and Document Intelligence instances. Even sending the requests one after another returns the same content as long as the document doesn't change.
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