I just noticed that you’re using WordPress Multisite …
This bugfix release I’m working on has extensive changes related to multisite. Would you be will to give me a temp super admin account. I’m like to install this bugfix release for you to ensure you have no further image loading issue.
In case you’re wondering why the image issue … all the code for working with images was rewritten from the ground up, yes from scratch. Why, several reasons. All previous version sof Connections utilized third party script instead of core WP functions. This was done because WordPress had a lousy image handling API at the time when this was added to Connections. This rewrite uses all core WP image API/s. With this rewrite I also added support for responsive images and HiDPI (Retina) image support. Hope that explains it clear enough.