Same thing, applications after 3rd May are in advance stage and my application is in process. Called them and they do not have anything to say. this is strange.
According to tracker, around May 10, people are getting bio request, and people from April or early May have their status App received. It means, there is no sequence.
May be they are cleaning up backlog. It does not make sense that 1st and 2nd May people are waiting and 8th May have medical request. I wonder which order they are processing applications. My status is still application received.