This is single handedly my biggest frustration with DL in general. The need to get a ticket reissued when the system doesn't do it or the agent doesn't know to do it when applying a GUC/RUC or when there's a schedule change or an SDC.
Then, when you do find someone willing to do it, having to wait on hold for 30 mins to an hour.
in 2023 it is just inexcusable that these things can't be done automatically