How to reproduce:
1. Open the “IN-109456_EnumCopyBug“ project
2. Open the “SampleScene”
3. In the Hierarchy select “MyGameObject”
4. In the Inspector in “My Component” right-click the “Copy From” array and select “Copy”
5. In “My Component” right-click the “Copy To” array and select “Paste”
6. Observe the “Copy To” arrays “Element 0” value

Expected result: The value is “-5”
Actual result: The value is “0”

Reproducible with: 2023.2.0a11, 6000.0.54f1, 6000.1.14f1, 6000.2.0b12, 6000.3.0a3
Could not test with: 2023.2.0a10 (There is no option to copy the array)

Reproducible on: macOS 15.5 (M1 Max), Windows 10 (by user)
Not reproducible on: no other environments tested

Note: Did not reproduce with “int” array