I have had a five or six packages go to the wrong place initially, and one or two completely vanish over twenty years, but it's rare nowadays to not have them show in the tracking system.
Online, it generally shows each step of the journey.
My problems have generally started with it getting put on the wrong local truck in the first place. Although while tracking, it does not list the specific truck, a weak link I feel, in their tracking system (at least at our end)