The Definitive Guide to Data Quality
I am facing the same issue. I changed a connection property for MySQL from not including the specific database (so I could look at all databases, then I changed it back to a single database. It wanted to look at all the components to update them, and I hit cancel. Then when I open an existing job that uses that connection I loose the statistics display above the flow lines. I have tried recreating the flow lines between components and that has not brought the statistics back.