The first rule of programming: It's always the progammers fault. Users have reported that o-range not always remember the settings from last exercise. Typically show/hide distance is not always saved in the memory. This can be annoying for those of you who don't want know the distance to the contros during the training.
Version 2.3.2 solves this issue. Your settings will now be put in the memory for the next exercise. This version can be uploaded from the Garmin Connect IQ store.