Ok, I see that OWL CAROUSEL has made some CSS changes with the 2.3 release.
OLD (Owl Carousel 2.2.1):
.owl-carousel .owl-item img {
display: inline;
width: auto;
height: auto;
max-width:100%;
}
NEW (Owl Carousel 2.3):
.owl-carousel .owl-item img {
display: block;
width: 100%;
}
So for now, add the following CSS to your site:
.owl-carousel .owl-item img {
display: inline !important;
width: auto !important;
height: auto !important;
max-width:100% !important;
}
While I investigate whether there will be any implications to reverting to the old CSS for images, which will then come in a future release.