This morning I created a Hard Drive Publish Service that used a Smart Folder that was defined by two criteria: 1. Label color = Green 2. Create date great than 01-01-2018. It immediately contained 300+ images, and I hit Publish. I watched as the photos moved from "new photos to publish" to "published photos." Then, inexplicably, some of the photos (which i of course had not touched) were moved to "modified photos to republish." About 41 photos were moved to this categorization. I can't find any pattern that would distinguish those photos from the others. I've seen LR do this before many times and wondered if it was something I was doing; this morning's test proved it was not due to my intervention.