CIE LAB Palette Matching Transparency Issue

[Gasparoken]

Reported: https://community.aseprite.org/t/cie-lab-palette-matching-transparency-issue/23585/2

Aseprite and System version

• Aseprite version: 1.3.9
• System: all

[dacap]

Just in case, the bug is reproducible in CIE XYZ and RGB too, doesn't depend on the criteria: