My Nike Run Club doesn't display calories

When I use Nike Run Club on my Apple Watch, it doesn't show calories(just as the pic below)

But funny thing is that it used to show the calories when I used Nike Run Club on my iPhone.

Another funny thing is that it shows calories on Workout app(e.g. yoga, cycling, etc. - as shown the 2nd pic)

Does anyone know how to solve this prob?

Thanks in advance!!

+ I use Apple Watch 4 Nike