Yesterday I submitted a proposal that cost me 6 connects. Today, I checked it again to see if the job is still available but I couldn't find it anywhere. I haven't gotten any notification from Upwork about this problem. I'm sure it has happened to me a couple of times. So apparently I just lost 6 connects?
Did you check your archived proposals as well? If you`re not able to locate your proposal there as well please reach out to me via PM with more details so that I can investigate it further. Thank you.