They really have a bunch of problems.

The article mentions the issues in Switzerland, where the order is worth $2bn. The delay here is now about 6 years, for various reasons (design issues, customer change orders, disabilities organizations, etc.). The penalty for the delays grew that much, that Bombardier is building 62 instead of the ordered 59 trainsets. They were supposed to become fully operational last december, but they still have issues, such as doors or software hiccups, and they run rather rough … a test by yours truly showed that, and Stadler KISS ran way smoother…

Well, a late famous railroader and railfan said that "with new trains, we always have to wipe their butts first…"