If there is an ingestion of 5000 records - with each record have at-least one primary ID but one particular ID namespace shows 3000 records what can be possible reason?
XDM validation failed (Can this be said with certainity) or Dataset or schema not Profile enable (then how come partial ingestion happened) or Namespace is not compatible with Identity Graph or Identity Service does not consume records having just one identity (It needs to have at-least two I believe)