Tile Pallet preview section weird vertical resizing behaviour

How to reproduce:
1. Create a new 2D Unity Project
2. Go to Window -> 2D -> Tile Palette
3. Narrow down the height of the Tile Palette preview to the maximum 
4. Observe the results

Expected results: The preview window reaches the minimum size and can't be resized anymore
Actual results: The preview window reaches the minimum size and then slightly expands

Reproducible with: 2022.3.55f1, 6000.0.32f1, 6000.1.0a8
Can't test with: 2021.3.47f1 (Different window design)

Reproducible on: macOS Sequoia 15.1 (M1)
Not reproducible on: No other environment tested