I´m really a big fan of the breathe app and using it at least 3 times a day. After starting the exercise I´m covering the watch a short time with my hand, so that the display gets dark during breathing. I´m closing my eyes anyway, so I don´t need the fancy animation
But since wOS 6 the app stops the exercise when covering. So the display has to be on with full brightness which is not good for the display and the battery as well. Really hoping that this is a bug and not a feature and Apple will fix this soon.