Air Venturi Avenge-X reg issues

I’m on my second avenge-X now - first one had crazy reg creep and a shifted barrel, this one still does crazy reg creep….anyone else experiencing this?

I have the reg ‘nominally’ set to 175 bar. With a full tank, after a shot, the reg will recover to 175, then creep up 10 bar within a minute or two. 10 minutes in, it’s up 15-20 bar. After I’ve shot the tank to 200ish bars, the reg will take a full minute to get UP to the 175. I can’t get a decent tune out of it….as I said, second gun - I’m kinda disgusted

Matt