I didn’t want to create a new thread for this, but now that you can enlarge images with the magnifying glass, after that it’s impossible to get back to the thread. There’s nothing to click, Esc does nothing, you can’t go back.
Esc doesn’t work, true, that would be nice. But there is an X in the upper right corner of the enlarged image, and that closes it and leaves you back on the thread/post you were on. Does that not show up for you?