First off, thanx for such a great extension. I'd used the .Net version of Adaptive Images and was please to know that there was an extension for Joomla already developed. Especially since I'm new to Joomla.
I found a small bug that I was hoping I could get some help with. I have uploaded a few different-sized images to be used in a masonry layout. Adaptive Images is doing its job on all of them and everything is working correctly except when I introduce an image that has a portrait layout. The image's exact size is 1727x2600. The layout on all of the other images is landscape with dimensions of 2100x1600 or something close to that. As soon as I add the portrait image the page fails to load. These are the breakpoints that I'm using: 1368,1274,992,768,480.
I'm using Joomla 3.7 with the latest version of your extension and JotCache.