Voltage dropping on Pro

Is there anyone out there besides Ring Support Folks that have upgraded to the 16v 30va transformer and has seen their voltage continually dropping? I have contacted Support on numerous occasions and keep getting not to worry. Does the Pro drop to a certain level before increasing or is the Pro a piece of crap? BTW I did have the Pro and the transformer professionally put in place. In one week my Mv level has gone from 4054 to 4016 at this rate in a month or so I am betting I will be offline.