We have also had this problem but I have been blaming it on operator error. It seems to be happening less and less now that everyone is making sure they hit the "Update Info" button before exiting the chart. It mostly wouldn't save the next of kin and race, ethnicity section for us. Never thought to consider it could be because two people are in the same chart at the same time which could be a possibility. I will track it now that I know.
