I updated to Lightroom 6.5, imported a few photos, and then went into the Develop Module to work on the images. As I was working in Develop, Lightroom would occasionally open the import screen. It did this five or six times over an hour period. Each time, I clicked the cancel button on the import screen, the import screen disappeared, and the Develop Module was again shown. None of the editing I had done was affected. I'm running Lightroom under Windows 10.