Sometimes the grass, but more so the bushes don't react and it looked weird in one scene in the stream. I noticed it while just enjoying the footage. It's no big deal, just stood out a bit.
In a few more days we can say for sure.
Since we are talking about weird stuff we noticed in the State of Play:
The look and physics of the horse tail kinda bothered me in the State of play. It looked and behaved like wet, floppy rags dangling from the horse's butt and there is also a lot of clipping of the different strands going on. Watching the leaked gameplay they seem to have fixed that. It doesn't look like a bunch of floppy rags anymore and it moves much more smoothly. So at least one improvement. :)