Since upgrading to the latest version of Lightroom classic, this happens. I have turned off use graphics processor in camera RAW as I've had issues in the past with that but it's still not working. It's not just this issue, everything seems to be running really slowly. Photoshop and other apps are running fine.
Lightroom Classic version: 10.1.1 [ 202101041610-8c69aa4e ] License: Creative Cloud Language setting: en Operating system: Windows 10 - Home Premium Edition Version: 10.0.19041 Application architecture: x64 System architecture: x64 Logical processor count: 8 Processor speed: 2.5 GHz SqLite Version: 3.30.1 Built-in memory: 32631.1 MB Real memory available to Lightroom: 32631.1 MB Real memory used by Lightroom: 8868.1 MB (27.1%) Virtual memory used by Lightroom: 8679.1 MB GDI objects count: 937 USER objects count: 2473 Process handles count: 1970 Memory cache size: 872.0MB Internal Camera Raw version: 13.1 [ 658 ] Maximum thread count used by Camera Raw: 5 Camera Raw SIMD optimization: SSE2,AVX,AVX2 Camera Raw virtual memory: 1329MB / 16315MB (8%) Camera Raw real memory: 1405MB / 32631MB (4%) System DPI setting: 144 DPI (high DPI mode) Desktop composition enabled: Yes Displays: 1) 3840x2160 Input types: Multitouch: Yes, Integrated touch: Yes, Integrated pen: No, External touch: No, External pen: No, Keyboard: No