I’ve noticed this when trying to book a flight with American Airlines earlier this year. Their website booking was essentially broken, insisting that one of my flight segments was fully booked but giving no indication of which one and attempting alternate bookings which replaced each of the segments in turn still failed. They’d replaced most of their phone booking people with an AI system that also was nonfunctional and wanted to direct me to the website to book. After a great deal of effort, I managed to finally reach a human being who was able to place the booking in a couple minutes (and, it turned out, at a lower price than the website had been quoting).