I just updated to the latest theme version from 5.x.x and at first the image at the top of the homepage (yorklgbthistory.org.uk) was no longer full width. I’ve now managed to get it back to full width using the Element CSS in Cornerstone (img{width:100%;}), but the image is being resized (downsized) from its original dimensions, and then having to be stretched to fit. You can see this by inspecting the element in Chrome: the image source is “https://i1.wp.com/yorklgbthistory.org.uk/wp-content/uploads/2018/01/cover-website-2018.jpg?resize=846%2C459&ssl=1”. Why is it being resized to 846px width, and how can I stop this behaviour?
Hi There,
That is the Photon module that is part of Jetpack plugin.
Please navigate to Jetpack > Settings (yourdomain.com/wp-admin/admin.php?page=jetpack_modules) click deactivate under Photon module. You should also disable other modules you don’t currently use.
For more information, please take a look at this:
Hope it helps 
1 Like
Thanks @thai! I didn’t find Photon in the settings, but I deactivated “Speed up image load times” (https://jetpack.com/support/site-accelerator) and that seems to have solved it. I was also then able to remove the Element CSS.
Glad to hear it fixed now, Remember to clear all your caching features (plugin, server-side, CDN, and browser’s cache) after updating so that the code from the latest release is always in use. This will help you to avoid any potential errors.
Cheers!
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