In Lightroom Sync and Auto Sync function completely differently. See the link below to an article that will explain.
Yes, I'm aware of that. I've used Lightroom for 5+ years. This feels like a performance issue, like LR is being starved for resources.
I've made some progress . . .
- Swapped 1:1 previews in favor of Standard previews.
- Increased cache to 70GB on system SSD.
- Restarted LR.
- Will likely spring for a separate SSD for catalog / previews.
- Alternative: temporarily store projects on that same, separate SSD, then move the project to external storage after editing.