Reproduction steps:
1. Open the attached “InstantiateAsync.zip” project
2. Enter the Play mode
3. Observe the Instantiated Prefab (In the Hierarchy “MyImage (Clone)”)

Expected result: The Instantiated Prefab is identical to the original one (In the Hierarchy “MyImage”)
Actual result: The Instantiated Prefab’s RectTransform Pivot, Anchor and Size values break

Reproducible with: 2022.3.21f1
Couldn’t test with: 2021.3.36f1, 2023.2.15f1, 6000.0.0b11 (feature was only added to 2022.3)

Reproducible on: Windows 11
Not reproducible on: no other environment tested

Note:
- Instantiating basic 3D objects does not seem to reproduce the issue