I accidentally triggered the discovery/bind process on an already discovered Hue hub and it seems it can't get out of it, even if I press the button on the Hue Hub.
This will be fixed in an upcoming hotfix. However, if you reload the browser page after pressing the hue bridge button when it asks, it should move to the next step.
After you push the button on the bridge are you clicking done or waiting? I've tested this 10 times and it worked all but one time when I was too impatient and clicked the done button.
It does work, if it's stuck, just remove it and start over. Press the bridge button and wait. It should then say successful within 5 seconds. If not, rinse and repeat.
Well it isn't a bug as much as a missing feature. Bug would imply we report the status incorrectly. The driver simply doesn't report it's status. Mainly because the logging shows it is active.
If you have a blank username then you have lost them already. Keep trying the cycle of push the bridge button, wait 5 seconds. It should refresh and with take you back to the hub select or find the username.
If after about 10 seconds you don't see either, click done and then start the process again.
Also, how did you get to this if you already had bulbs discovered? You can always start a new instance of the hue bridge app and see if it works. Something else might have screwed up this instance.