Sync settings between images slow and synced image does not update preview

[SteenHK63]

After updating to 11.3 sync settings is very slow and the synced image does not update the preview in Library module. Preview updates after restarting LR though.

This is a problem on two of my Windows PC's after updating to 11.3.

[johnrellis]

There have been a number of reports about this. Unfortunately, without a reliable way of reproducing the problem, Adobe is unlikely to make much progress in fixing it. LR 11.3.1 was just released -- if the problem still occurs with 11.3.1, please post back with more details.