Please do the LR menu command Help > System Info and copy/paste the entire contents here so we can see exactly which versions of hardware and software LR thinks you're running and important LR options that are set.
Lightroom Classic version: 12.5 [ 202308091523-68a7abd6 ] License: Creative Cloud Language setting: en Operating system: Windows 10 - Business Edition Version: 10.0.22621 Application architecture: x64 System architecture: x64 Logical processor count: 24 Processor speed: 3.1GHz SqLite Version: 3.36.0 CPU Utilisation: 0.0% Built-in memory: 65277.3 MB Dedicated GPU memory used by Lightroom: 926.4MB / 10078.0MB (9%) Real memory available to Lightroom: 65277.3 MB Real memory used by Lightroom: 4821.1 MB (7.3%) Virtual memory used by Lightroom: 6619.8 MB GDI objects count: 942 USER objects count: 2746 Process handles count: 2348 Memory cache size: 0.0MB Internal Camera Raw version: 15.5 [ 1595 ] Maximum thread count used by Camera Raw: 5 Camera Raw SIMD optimization: SSE2,AVX,AVX2 Camera Raw virtual memory: 2377MB / 32638MB (7%) Camera Raw real memory: 2860MB / 65277MB (4%) System DPI setting: 144 DPI (high DPI mode) Desktop composition enabled: Yes Standard Preview Size: 1440 pixels Displays: 1) 3840x2160, 2) 3840x2160 Input types: Multitouch: No, Integrated touch: No, Integrated pen: Yes, External touch: No, External pen: Yes, Keyboard: No
Graphics Processor Info: DirectX: NVIDIA GeForce RTX 3080 (31.0.15.2225) Init State: GPU for Export supported by default User Preference: Auto