Can't disagree there, should just be a check box or a click & confirm somewhere in iCrew. That said, if I'm on hold more than a few minutes, I hang up and call crew assist or use the app, let them relay. If you really want to cover yourself just shoot a quick email to the CPO saying you tried to crew scheduling but had unreasonable wait times...I'm sick for rotation XXXX. They'll figure it out sooner...or maybe later.