Nodding after FFF?

My quad seems to fly pretty well normally but has some trouble when travelling fast if you take a look at the log, between line 15 and 16k after letting the pitch off flying at 25m/s it does a fairly descent nod?

Quad is a pixhawk tbs discovery, running 4s 4000mah, with 880kv 2217 motors and 1045 props, auw is around 1.6kg. Now it is a little overpowered which probably isnt helping but it is a bit gutless with the 9443 props I have also.

I have run it through the auto tune twice now, last time on a really still day which completed really fast.

Any ideas?

Also 1 of my motors seems to max out before the rest, is this anything to worry about it is not by much?