Hi Andrew, Did I get it right that Lr Desktop is not syncing your photos which you can see within the Lr Mobile app plus on Lr Web (lightroom.adobe.com). ​ ​If so, could you send me a LR Desktop diagnostic log - best as a private message with a downloadable dropbox link. You can trigger the log via LR Desktop preferences -> Lightroom Mobile and when you hold down the alt key you will notice a generate diagnostic log button ​ ​Thanks in advance. ​Guido/ Lr Mobile QE
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