When i use SYNC SETTINGS between 2 or more photos, LR do not open the dialog box to choose settings i want sync and the LR stay unresponsive. To close, you need to go to task manager and end the task. All others function, seems work without problems
LR version: 12.0.1
Camera RAW: 15.0
Windows: Windows 10 Pro 22H2 build: 19045.2311
GPU: RTX 2060 Nvidia Studio Driver version 526.98
To reproduce, just apply the sync settings.
Some extra info maybe can help: GPU acceleration is FULL enable. Im using CR2 files ( canon 5d MK III )