I recently upgraded from 220.127.116.11 to 18.104.22.168 and now we are unable to upload images. I had already applied the SUPEE-8788 patch before and had already switched from the Adobe Flash to the new HTML5 uploader and that was working before.
I have looked in PHP and nginx error logs, but there is no error. I've also verified that the image is uploaded to the directory
mage_root/media/tmp/catalog/product but it does not get moved out of the tmp folder. As far as I am aware all permissions are correct.
I've already tried the solutions listed at: Upgrade from 22.214.171.124 to 126.96.36.199 Can not Upload Product Images in Admin but did not have any luck.
Any help would be greatly appreciated.