How to reproduce:

# Open the “WAX.zip“ project
# Open the “SampleScene”
# Select the “Slices Wrong” image in the Assets folder
# In the Inspector window click on the “Sprite Editor” button
# Click on the dropdown menu “Slice“
# Click “Slice“
# Observe the Sprite Editor window

Expected results: The sprites are sliced correctly (6 distinct sprites are cut out)
Actual results: The sprites are sliced incorrectly (more than 6 sprites are cut out, many of which are of nothing)

Reproducible in: 2021.3.33f1, 2022.3.16f1, 2023.2.4f1, 2023.3.0a19

Reproduced on: macOS (M1, 2020) 13.5.2
Not reproduced on: Windows 11 Pro