When I first got my 7125, the trigger did the opposite of what it was supposed to do. A tech told me that the Power button has a mechanical on and off position internally. I needed to depress the power switch to get it in sync with the trigger function. After I did that it was all good.

Not sure if your amp has the same style switch, but it sounds like the same issue.
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Home Theater: Epson 8100, Onkyo 876, Outlaw 7125, Oppo 103, Speakers: Paradim Monitor 7, cc370, Totem Lynks x 4
2 Channel system: Oppo 95, Parasound Halo A21, Halo P7, Paradigm Signature S6
Bedroom: NAD C326BEE, Panasonic S97, Tannoy Revolution DC4, Energy Classics