Another problem is that you don't get to control the start of a FaceID scan. Many apps that I use (mostly for banking) have some non-deterministic loading proce

Another problem is that you don't get to control the start of a FaceID scan. Many apps that I use (mostly for banking) have some non-deterministic loading procedure that can take from 1-20 seconds. At some point, the load completes and the app initiates a FaceID scan. If you're not holding the phone at the right angle at that moment, the scan fails. Then it falls back to a passcode. It's a terrible user experience. They should give me the chance to push a button after I've gotten the phone in the right position before initiating the scan. Or they should give me the chance to retry the scan if I wasn't ready. As it is, they expect me to hold my phone rigidly for a non-deterministic amount of time in order to use FaceID.