Undo lap press during garmin coach workouts

I can't believe there is no way to undo a lap press during garmin coach workouts. This is extremely frustrating.

The "Lap/Next Activity" button is also the 'back' button during normal use, which is very confusing and clearly prone to unwanted presses. I am a newbie and I am already so tired of ruining my workouts after 5km by mistakenly pressing the lap button. This is something which is asked all over the place by users around the world, why the heck does Garmin refuses to implement something that would take 15min to one of their software engineer?