After exiting a Carousel gallery, the back button takes me back to the gallery rather than to the previous page.
This looks like it was fixed in Jetpack 2.1.2 -
Bug Fix: Carousel: Clicking the back button in your browser after exiting a carousel gallery brings you back to the gallery.
....although according to the FAQ this plugin is already at Jetpack 2.2.2, so not sure whether this might be a different issue?
Would it be possible to update the plugin to the latest version of Jetpack to see if it resolves the issue?