Site URL: https://flic.kr/s/aHsmWuN9y7
I'm currently building a website for someone else, and this is my first experience with Squarespace.
At this point this is a rather simple website with an image and some text on each page, but it occurred to be that the pages were taking too long to load. Accordingly I downsized the image files and replaced each website image with its smaller counterpart. For most of the images, this worked fine, but the last one became stretched and distorted after I saved my changes. This image, too, looked OK prior to saving. The odd thing about all this is that you don't see the distortion until after you save your changes.
I've tried both just replacing the image in the existing image block, and deleting the entire image block and recreating it, but the result is the same.