My driver front door, on my 2015 optima lx won't open from the outside. I roll the window down to use the inside handle. All other doors open from the outside handle, lock and unlock like they're supposed to. I also used the key fob on the inside to see if the doors will lock and they do. Also when I try the handle it does spring back like it is supposed to. I'm trying to figure what's wrong with it. Any suggestions on what else I can do? I forgot there's approximately 55k miles, if that helps any.