Bootstrap 4 Grid Row - Images Not Aligning Vertically - html

Question

I have a row of images that for some reason aren't aligning vertically. If I use all the same images, it looks fine, but if I replace with a different image with slightly different dimensions it doesn't work. Here's an example below:
Here's my HTML code..note I am using some custom CSS for an overlay, not sure if that could be causing a problem
<div className="container">
<div className="row">
<div className="col-xl-12 mx-auto mb-3">
<h2 className="abouthead">Portfolio</h2>
</div>
</div>
<div className="row">
<div className="col-lg-4 col-md-12 mb-4">
<div
className="view overlay hm-black-strong"
data-toggle="modal"
data-target="#modal1"
>
<img
src="http://localhost:3002/images/dealmazing.JPG"
className="img-fluid"
alt="sample"
/>
<div className="p-2 bg-info text-white">Deals Website</div>
<div className="mask flex-center">
<p className="white-text">View Project</p>
</div>
</div>
</div>
<div className="col-lg-4 col-md-12 mb-4">
<div
className="view overlay hm-black-strong"
data-toggle="modal"
data-target="#modal2"
>
<img
src="http://localhost:3002/images/crypto-portal.JPG"
className="img-fluid"
alt="sample"
/>
<div className="p-2 bg-info text-white">
Cryptocurrency Portal
</div>
<div className="mask flex-center">
<p className="white-text">View Project</p>
</div>
</div>
</div>
<div className="col-lg-4 col-md-12 mb-4">
<div className="view overlay hm-black-strong">
<img
src="http://localhost:3002/images/dealmazing.JPG"
className="img-fluid"
alt="sample"
/>
<div className="p-2 bg-info text-white">Deals Website</div>
<div className="mask flex-center">
<p className="white-text">View Project</p>
</div>
</div>
</div>
</div>
//CSS
#import url(https://maxcdn.bootstrapcdn.com/font-awesome/4.7.0/css/font-awesome.min.css);
#import url(https://cdnjs.cloudflare.com/ajax/libs/mdbootstrap/4.4.3/css/mdb.min.css);
.hm-gradient {
background-image: linear-gradient(to top, #f3e7e9 0%, #e3eeff 99%, #e3eeff 100%);
}
.darken-grey-text {
color: #2E2E2E;
}

Answer 1

Have you tried specifying a height for your image? And then apply Object-Fit CSS property.
img {
object-fit: cover;
width: 400px;
height: 400px;
}