Hopping up and down just got a sideways look (“what the heck is with this new person?!?” kind of look). She also didn’t really worry when my cat hopped on with me to ride double, and when I later dropped him off on a jump standard. (she has every reason to question her new person…), so it seems unlikely to be sudden movement.
I wonder if she has just missassociated the pain of being dismounted (when her back was sore: it isn’t now) with the rider dropping rather that with the other steps of dismounting?
On another note, she has put on some weight which I think is helping me feel more balanced…either that or I am just getting used to her. I have only been riding her and another somewhat narrow horse lately which I think is helping. I wonder how it will feel to ride a “normal” horse again!