Hi, did you check the corresponding discovery logs to see if something is going wrong?
Go to C:\Program Files\Microsoft Configuration Manager\Logs and inspect your discovery logs for each method. You can use SMS Trace (Trace32) which comes with ConfigMgr Tools or any other log viewer you wish (not notepad! It does not update the logs simultaneously) Open your log files with the log viewer and run the discovery methods. See if the logs start writing immediately, or your discovery is being delayed.