A random mixing time is fine, but you should let the customer know how long it's going to take. With an automated system, that shouldn't be a problem.
It must be state of the art system so advanced that even operator don't know this time, because it uses advanced AI hybrid algorithm

That would really help as we have to pay our workers and the error has caused a negative cash flow , we are legitimate mixer and we dont scam to get profits, we only make 1-3% and this error has set us back deeply.
You are a joke mixer, and if you have millions of fake-fresh coins you have nothing deep to worry about, so please tell us who made a mistake, computer system or some guy behind a screen?