Amp/subs cut out when bass hits to hard

I recently wired my 2015 Jeep Wrangler with 8gauge power and ground. I have a pioneer avhp1400dvd head unit, Kenwood 8105D mono pushing a brand new Rockford Fosgate p3s 1x12 loaded enclosure. I noticed when I turn the input sensitivity down I can have the bass boost on the amp all the way turned up. But if I turn the bass up using my head unit EQ, the amp/sub cuts out until I either lower the volume or turn my jeep on/off. The kenwood amp puts out 500 rms and the subs are rated for 400rms but they are Rockford so I know they can handle more. In my old vehicle I had the same amp pushing 2 kicker comp vr 12s with ported kicker enclosure and they would hit so hard!! I know that with this being a sealed box and only being 1 12" sub it's not going to hit nearly as hard but I should be able to push this thing a lot harder than what it's putting out now. The ground is nice and tight so I don't think it's that, I made sure to scratch all of the pint off and bolted it to the body, 8 gauge is recommended with this amp, my jeep only has 9k miles so I don't think it's the batter/alternator. I'm about to throw my old kicker box in the jeep and see if the problem persist.... But does anyone have a suggestion as to what it may be? I have read so many threads but can't seem to figure it out. I'm starting to wonder if the subs being internally wired to 1 ohm is conflicting with the amp which I can only assume is 2 ohm stable but I'll be the first to admit the ohm thing is kind of over my head. Any suggestions will be greatly appreciated