issue full height background image on mobile

Hi there,

I've added a full height row with parallax effect. Now on desktop the full height works fine, yet on mobile the background image is shown at a huge size. Which settings should i use for the row?
I have:
ROW SETTINGS - general:
- stretch row
full height row? yes
columns position: middle
parallax: simple
parallax speed: 1.5
ROW SETTINGS - Design options:
background image set to cover

Thanks! Ed'