How to reproduce:
1. Open the attached “IN-127379” project
2. Find TextureX.jpg (Assets → AreaProcessor → Textures), modify and save it
3. Observe the console window

Actual result: The console only shows 3 sprite atlases
Expected result: The console shows 4 sprite atlases

Reproducible with: 2023.1.0a5, 6000.0.64f1 (5360b7cd7953), 6000.3.2f1, 6000.4.0b1, 6000.5.0a3
Could not test with: 2023.1.0a4 (on Mac this and older versions are very unstable)

Reproducible environment: macOS 26.1 (M1 Pro)
Not reproducible environment: No other environment tested

Notes:
- I suggest changing texture through external image manipulating program and exporting it to the same location
- “.spriteatlas” doesn’t have this issue only “.spriteatlasv2”
- AssetDatabase.FindAssets("t:SpriteAtlas") & Resources.FindObjectsOfTypeAll(typeof(SpriteAtlas) behave the same