The Scan Status has always looked this way if the machine is not currently in the scanning queue. If the machine is in the scanning queue, the Scan Status will either list its position in the queue or (if the machine is first in line) "scan in progress". I'm not sure whether you are perhaps stating that the Scan Status isn't indicating when the machine is actually in the queue, but this is behavior I am not able to reproduce.
If what you are after is information on when the machine was scanned, you can find this partly in the Summary tab of the machine (First Seen, Last Seen, Last Tried) and more in detail for Windows computers in the Scan Time tab.