This might seem dumb, but im having a lot of trouble shifting while im standing up. It feels fine sitting down but when standing up and theres more weight on the pegs, my foot seems glued to the peg. Then when i pick it up to shift, i cant be precise with the shifter lever because the movement of the bike jostles it around. Its verrrrrry frustrating because sometimes i shift good and then other times i miss shifts or shift too much. Does anyone else have this issue??