Textures used by GUIStyle are being unloaded when using Resources.UnloadUnusedAssets()

Steps to reproduce:
1. Open the “Sandbox” project
2. Open “TestScene” scene
3. Enter Play Mode
4. Observe text in the top left corner

Expected result: Shows the text in a red square
Actual result: Shows only text

Reproducible with: 2020.3.43f1, 2021.3.16f1, 2022.2.1f1, 2023.1.0a24

Reproduced on: macOS Monterey 12.2 (Intel)

Note: The issue is reproducible in an Editor and in a build