Mobile sync issue

[ngphoto]

Every time I take a photo with Lightroom Mobile on my iPhone SE, the sync with Lightroom Classic on on MacBook gets stuck part way through (often it sits for hours even days saying something like "71% complete"). I have to delete the lrdata file and re-sync ALL my photos every time. So, there's a workaround I can use, but I don't think it is supposed to behave like this.

[Just Shoot Me]

First is your phone actually uploading that image to the Lr Web system? Have you checked that is happening?

No files ever get downloaded into LrC without first being completely uploaded from your Mobile Device to the Lr Web system.

[ngphoto]

Hah! After several weeks of repeatedly deleting the sync lrdata file and re-syncing, the moment I put something on here, it starts working again!

The files were being loaded into LrC and I could see them on the phone and on the MacBook. The issue was that the sync never said it was finished, so everytime I exited LrC I got a warning message saying photos were still syncing and did I really want to exit. That said, sometimes I would get 4 photos out of 5 into LrC and the fifth would never make an appearance.

But it seems to be working today.

[ngphoto]

I'm having problems again, but I have noticed in LrC that all the photos that are stuck are saying "Build Smart Preview for Lightroom ecosystem". This stage of the process seems to stall and never complete. The photos are on my phone and are in LrC.

[ngphoto]

Interestingly, all the (3) photos that are currently stuck like this are ones that I have not touched since they successfully synced yesterday.