Ok, Im struggling to figure out if its all me, or the fact I'm at a new Flying field. But I flew my Velox XL with a huge AMT 450 at 45 pounds

yesterday, and on my 5 flight of the day I was setting it up for a Full power fly by, lets say I'm sure I'm close to 200mph limit at 1/2 power.

But as I lined it up I got a pretty strong wing rock that scared the crap out of me! Yes it was windy yesterday but at the speed I was going I can see that causing it. So I landing and recharged my 2 2100 mah 6.6 life packs, One pack took 400mah and the other 1300mah.
So I figured this was a sign that one of my life packs are bad. So I went ahead and dischard both packs from full and got 1900 mah in both packs wich is odd, then I was reading the my Spectrum AR 12120 power safe receiver pulls from the stronger pack as a safety function..... And Im using JR 8711 on all the control surfaces as this is such a big and fast jet. DX18 Gen 1 for 4 years now.
So now I don't know what to think.
But later in the week I had the same twitch with my Carf Eurosport with Jetcat Titan with a Cortex gyro. But thought it was the wind as I was at a lower speed and just added fuel pods under the wings.
I'm concerned, is it me or the field (I fly at a SOD farm, so its flat for miles, except a creek on the left of our field which is kind of were these both happened.
Anyone else get odd wing rock / twitch in there flight?
Thanks