Steps to reproduce:
1. Open the “UITKTest” project
2. Open the “NewUXMLTemplate” asset
3. Observe the Viewport

Expected result: Two sprites are visible
Actual result: Only one Sprite is visible, which is not packed with the Sprite Atlas

Reproducible with: 2022.2.0b5, 2022.2.0b14
Not reproducible with: 2020.3.41f1, 2021.3.14f1, 2022.1.23f1, 2022.2.0b4, 2022.2.0b15, 2022.2.0f1, 2023.1.0a20

Reproduced on: macOS Monterey 12.5.1 (Intel)

Notes:
- Open the “NewUXMLTemplate” asset, select any VisualElement and notice that the Sprite is set as Background Image
- Select the “New Sprite Atlas” asset and notice (in the Inspector) that one Sprite is packed which is not displayed
- Not reproducible with Texture
- Also reproducible in the Player