When I approach a jump at a posting trot, Lara is just fine, but when she is right in front of the jump, she stops and then she does a sort of sudden jump and keeps on trootting lazily after the jump. Since I'm a beginner, my instructor doesn't care about that much, but I find it super annoying. It also means that it makes my position all wonky, and I think it would be much, MUCH better if we could go over smoothly. Don't even think about telling me to canter it, I don't know how to canter.
And one last detail, if it helps: Lara used to be a jumper.