I use Lightroom 5.2 on my iPad Pro, MBP, and an iMac.
I transferred all my data from an old iPad Pro to a brand new one last night. Upon completion of the transfer I opened Lightroom, all my albums were populated with images, but as I sat there I was watching the count on each album go to zero. Out of 41 albums only seven now have images in them. My total photo count was at around 6500, and is now showing 544.
I then opened my MBP, and launched Lightroom, only to see the same thing, images present and correct, then rapidly dissappearing to zero.
This morning at work, I do the same thing with my iMac, images are present, then completely dissappear.
All the original images are present on my external SSD drive, but it would take hours and hours to recreate the albums.
Does anyone have any idea why this has happened, and more importantly is there anyway of restoring my albums?
Please check at https://lightroom.adobe.com and verify the assets and albums in the cloud there. That is the state your new Ipad should arrive at when syncing is complete. Is the information in the cloud accurate? Is sync complete?
There are a couple of ways for sync to be turned off.
You do it
You sync a different LrC catalog to your cloud account.
I would recommend waiting until Lightroom Classic is done syncing then verify the cloud is correct.
If your devices are not syncing by then, check for paused syncs on each and double check that the same Adobe ID is in use on each. It is the most common fix when this type of thing is reported as many people have more than one registered Adobe ID and don't realize they are signed in to the wrong ID.