The on-screen fingerprint sensor on newer models is infuriating. Unlocking the screen is always a two-action operation of "tap the screen -> wait for it to fade in / wake up -> put your finger on the sensor".

The first tap to waken the screen often fails so I have to try one or two more times.

It's a small thing but, I have to tumble with it probably 100+ times a day given how often I check my phone for e.g. Slack. It should be the smoothest part of operation, imo.