I haven't been using preview, so I'm not sure if this is a change or if it has always been working this way, where it shows attachment links to photos in the preview, and shows the actual photos below that in the edit view. Is that how it's supposed to work? Isn't that backwards? I did the preview this time to see how the photos were going to be arranged on the normal screen size.
I don't know. For comparison against the default behaviour, one needs to use the XenForo boards and compare to here.
You're right, the default behaviour. Thanks. I found a place to test it here: As Designed - Attachments Do Not Display When Previewing a Post