Customizr slider image gets cut

Hi. My website is mbwoodcraft.com. In my website gallery, when you click on either image (currently only bathrooms, bedrooms and miscellaneous have been done) a page with a big slider comes up. My current issue is that when you open the pages with the sliders on a phone the pictures sides get cut off, and I don’t understand why, as they look fine for a few seconds after you open them, but then they change. I want them to look like they do on a laptop, but I want them to look that way on phones and tablets.

What I noticed is that when you make the window smaller, that slider only gets shorter length wise, but not height wise, so it doesn’t adjust to the picture.

Can anyone please please help.