I have the same issue from time to time, but I look away and then look back a couple of times and it straightens out. I also notice looking at something for a while it will trail and then update and be on target. I agree, this is annoying when looking for the target in the circle, but the aircraft is somewhere offset, so I can never tell exactly what I am looking at, whether it be my target, another opposing aircraft in the same general area or a friendly that is sitting outside of the circle and then the circle snaps over the aircraft. Sometimes it is too late, especially when waiting on and confirming IFF.