I very, very rarely request an exam without having all the medical records in file. For one thing, it's far better to get records from your treating source than from an exam. For another, it's far cheaper.

However, a few things could have happened here.

During your interview, when you provided a list of doctors, did you remember to include all of your doctors? You may have been so overwhelmed during the interview that you forgot this one, and if it's not on the list, we have no way of knowing that you see them. In fact, to be honest a majority of my claimants forget to mention one or more doctors until later in their case.

Did you start seeing a new doctor and forget to give us that information? We need updates

Also, in many offices, requests for medical records can get lost. It is not the doctor personally who handles them in most cases. In fact, very rarely does a doctor see an actual request in my experience. It's the medical records department who handles them.

So in answer to your question, no, it is not common for this to happen. But it does happen.