Furthermore when you login to a client via wireless and start a scan, you cannot stop it anymore
Because the scan will kick you out (stopping the current associations for scanning), and you cannot stop the scan anymore.
Or perhaps it stops automatically, and you can re-login, but not see the results.
There fore there's a feature request flying around to be able to start a scan for a specific time (say 10 seconds), then end the scan (restoring normal wireless connectivity) and saving the result to a file (for review).
Best regards,
Christian Meis