I have edited a number of images using Adobe LR Mobile, they have been synced with the cloud and the changes can be seen in the cloud (when i log in to Lightroom via a web browser). the problem is the desktop application is not pulling the changes back. Please advise as i cant go through editing all the pictures again on my desktop.
Could you try to remove the sync.lrdata file and restart LrD. This would restart/refresh the sync (metadata only).
Removing the Sync.lrdata might fix whatever the issue is. Or, at least, might trigger it to occur again. So remove the Sync.lrdata, start Lr, and then wait until it either syncs or gets stuck again and create at this point a Lr Desktop diagnostic log which can hopefully provide some clues.
You can find the sync.lrdata file here:
On Mac it's at /Users/<user>/Library/Caches/Adobe/Lightroom/Sync Data/Sync.lrdata
On Win it would be at C:\Users\<user>\AppData\Local\Adobe\Lightroom\Caches\Sync Data\Sync.lrdata
You can trigger the diagnostig log via LR Desktop preferences -> Lightroom Mobile and when you hold down the alt key you will notice a generate diagnostic log button
If you stilll see the issue please send me a the diagnostig log - best as a private message with a downloadable dropbox link.