Apple Watch 5 doesn't count the time of exercise right
I've bought an Apple Watch 5 for my wife about 2 weeks ago. Couple days ago she started to mention, that her trainings doesnt count right. For example, today she did Walking for 60 minutes. It counted everything right (calories etc.), but as an exercise it counted only 19 minutes. I insert images. They are in Russian, but i think you can get the main idea.
Why and how to fix it? Thank you.
Apple Watch