Cropping ignores set aspect ratio

I’m uploading Ian image that is 1536×998. In my function.php file I have several image sizes specified.

add_image_size('thumb-uncropped',300); // (uncropped)
add_image_size('x-small',320); // (uncropped)
add_image_size('small',640); // (uncropped)
add_image_size('small-cropped',512,384, true);
add_image_size('small-square',512,512, true);
add_image_size('smedium',768); // (uncropped)
add_image_size('smedium-cropped',768, 576, true); // (uncropped)
add_image_size('smedium-square',768, 768, true); // (cropped)
add_image_size('medium',1024); // (uncropped)
add_image_size('medium-cropped',1024,768, true);
add_image_size('medium-square',1024,1024, true);
add_image_size('large',1280); // (uncropped) - 2x small size
add_image_size('large-cropped',1280,960, true); // (hard cropped) used in slider and call to action widgets
add_image_size('large-square',1280,1280, true);
add_image_size('larger',1536); // (uncropped) - 2x smedium size
add_image_size('larger-cropped',1536,1152, true); // (cropped) - 2x smedium size
add_image_size('larger-square',1536,1536, true); // (cropped) - 2x smedium size
add_image_size('extra-large',2048); // (uncropped) - 2x medium size
add_image_size('extra-large-cropped',2048,1536, true); // (hard cropped) used in slider and call to action widgets - 2x medium-cropped size
add_image_size('xx-large',2560); // (uncropped) - 2x large size
add_image_size('xx-large-cropped',2560,1920, true); // (cropped) - 2x large size

add_image_size('srcset200',200); // (uncropped)
add_image_size('srcset400',400); // (uncropped)
add_image_size('srcset600',600); // (uncropped)
add_image_size('srcset800',800); // (uncropped)
add_image_size('srcset1000',1000); // (uncropped)
add_image_size('srcset1200',1200); // (uncropped)
add_image_size('srcset1400',1400); // (uncropped)
add_image_size('srcset1600',1600); // (uncropped)
add_image_size('srcset1800',1800); // (uncropped)

I’m specifically trying to adjust the crop for the square images. However, when I upload this image and then try to adjust the crop on 1:1 aspect ratio images and save the crop, the images are squished horizontally. It’s as though the plugin is resizing the image to fit within a square crop, rather than actually cropping the image as specified.