iMac Photos won't import iPhone photos in Normal Mode

My iMac 27-inch, Late 2015 running Monterey cannot import photos from iPhone 13 pro running iOS 26.2. When the iPhone is selected in Photos, it doesn't show any new photos (since last import) and shows a somewhat random number of previously imported photos. When I start up the iMac in Safe Mode (shift key on startup), the new photos do appear and can be imported as usual. I've since deleted all of the applications in Login Items. What else can I do to restore the iMac's ability to import photos whilst in Normal Mode?