When I Chosse Loupe on second monitor It works fine, like above.
If use 100% zoom, then the image come with parts missing.
Lightroom Classic version: 13.0.1 [ 202310121438-d2af310c ]
License: Creative Cloud
Language setting: en
Operating system: Windows 11 - Home Premium Edition
Version: 11.0.22621
Application architecture: x64
System architecture: x64
Logical processor count: 16
Processor speed: 2,3GHz
SqLite Version: 3.36.0
CPU Utilisation: 2,0%
Built-in memory: 16110,7 MB
Dedicated GPU memory used by Lightroom: 3260,1MB / 6009,0MB (54%)
Real memory available to Lightroom: 16110,7 MB
Real memory used by Lightroom: 2919,3 MB (18,1%)
Virtual memory used by Lightroom: 7093,3 MB
GDI objects count: 773
USER objects count: 3056
Process handles count: 2511
Memory cache size: 270,6MB
Internal Camera Raw version: 16.0 [ 1677 ]
Maximum thread count used by Camera Raw: 5
Camera Raw SIMD optimization: SSE2,AVX,AVX2
Camera Raw virtual memory: 1413MB / 8055MB (17%)
Camera Raw real memory: 1524MB / 16110MB (9%)
System DPI setting: 120 DPI
Desktop composition enabled: Yes
Standard Preview Size: 1920 pixels
Displays: 1) 1920x1080, 2) 1920x1080
Input types: Multitouch: No, Integrated touch: No, Integrated pen: No, External touch: No, External pen: No, Keyboard: No
Graphics Processor Info:
DirectX: NVIDIA GeForce RTX 3060 Laptop GPU (31.0.15.3713)
Init State: GPU for Image Processing supported by default
User Preference: GPU for Export enabled