After I get done with a strength workout, I go back and update the exercises my watch tracked to what they actually were (given usually the watch thinks it was something else). When I go to change the exercise (i.e. I'm trying to change "curl" to "dumbbell bench press") it will not change. It just adds a blue checkmark next to the exercise but that's the end. Usually you'd select the exercise, it would update, and go back to the main screen. It just adds a checkmark and gets stuck.
This has been going on for three days and my app is up to date.