That's not just Envoy. Back around 2004 I showed up for a CRJ200 trip (Mesa) in PHL. No F/A showed up. Turns out she had quit like 2 weeks prior.

I went out on medical at Mesa because I needed FAA clearance to resume flying after a bout with skin cancer. Based on what the Doc at AMAS told me I told Mesa about 2 months of leave would be needed. Near the end of that 2 months still no clearance from the FAA. I get an email from another pilot wanting to know if I could pick up a trip a leg early so he could start vacation or something. I'm like WTF? I do not have a valid medical. Checked the scheduling computer program and there I was, automatically scheduled to fly with no medical yet