Every time I change my cover/header image, it changes back! What's up?
Don’t worry, your new image really is there, and it’s likely that everyone except you is seeing it. This is an unfortunate consequence of how browsers cache (and expire) images.
Try opening a Private/Incognito window in your browser and viewing the page. You can also restart your browser, manually clear the cache, or just wait a bit for your browser’s cache to expire. You could also try viewing your website using a different browser, different computer, or mobile device.
Additionally, our CDN caches your images/artwork, and it can sometimes take a few minutes for the cache to be purged.