Well that would depend on how much twist we are talking about. I recently put together a balsa park flyer that was damaged in shipping. It had about 7 degrees of warp in the wing, which was pretty easy to see. But a Kaos arf from a few years ago had a 1 degree warp in the wing which I only found when I put an incidence gauge on it. You can often see warps in strip aileron wings when you can't get the ailerons aligned on both ends. A 3-4 degree warp could cause the problem you are describing, depending on how much aileron authority it has to counteract the warp. Of course, your ailerons could have been out of trim after the radio issue and reversing the surfaces. That's the main reason I won't ever get caught using Spektrum equipment on anything besides BNF park flyers.

And yes, I know the OP didn't say he was using Spektrum. But I'll bet he was.