If text is added to the “Notes” field under Wi-Fi SSID, “Advanced Settings” you can not delete all the text later. For some reason after you enter text into the “Notes” field you can not leave it blank later. There has to be at least one character in the “Notes” field. A work around it to just enter a space then it thinks there is text in the field, and it will look blank. I know this is a very low on the priorities of bug fixes and new features. (I am half hoping this is easy enough to fix to see if at least one of my requests are answered 
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This has been resolved in the Cloud Controller, and will come to the local controller early next week.