I've purchased this stroller, brand new (it's my first one!) and the suspension is unexpectedly hard - I can barely see the movement in the actual mechanism if I try to bend it with my hand, or by leaning my weight on it. That's on both the front and the back wheels. I know it's not an all-terrain stroller, of course, but is that kind of hardness expected, or at least, will it get better with time? To be fair, the stroller is empty at the moment :) Thank you!