The color swatch “Replace” Option may appear to work, until you re-select that color… It’s still the previous (or first) color.
There’s a chance it’s been fixed since, but I haven’t checked.
Build Details
Nightly Build Jun 8 2022
commit: a2d5ac4caacb9f5b7ec4f3b0f833b2e16a97dbd3
date: 2022-06-08_20:55:16
Operating System: Windows 10 Version 2009
CPU Architecture: x86_64
Qt Version: 5.15.2