Basement floor drains are supposed to *remove* basement water, not bring it in.
One of the reasons that home inspectors run so much water during an inspection is to reveal problems like this one. The basement floor drain is connected to the main sewer line, which doesn’t drain fast enough. As a result, some water backs up into the basement. While this might be a sign of a simple obstruction in the sewer line, it might also be a sign that the whole sewer line needs to be replaced.