I just opened Lightroom on iPad and it had updated to the latest version with presets. I was going back through images I had taken on my iPhone and processing them. But when I back a few days instead of downloading the smart preview I only get a T505 error.
If I continue back through the photos then occasionally one loads, but almost all don't. But if I go back far enough (to late April) they start loading again.
I have deleted and reinstalled the iPad app and it made no difference.