Borrowing the thread. I just filled in the feedback form but on clicking Submit, I received no case number ("feedback registration number") or any other confirmation that the feedback went through, although also no denial that it did not. The site just went back to the mode where I can alter the text again but it does not show any errors such as "this field is mandatory" etc.

Did it go through? Where can I find the feedback registration number? Shouldn't I receive an email confirmation?