You have a fundamental misunderstanding on how multicolor 3D printing works. You are making color changes between a bright and dark color. There will be bleeding if you don't tune the flushing volumes within bambuslicer. watch: https://www.youtube.com/watch?v=p3ZIM3megIU
and read this forum post: https://forum.bambulab.com/t/so-much-purge-tower-infill-support-poop-why-does-it-do-them-all/14369/14
The printer isn't a perfect machine as it only follows YOUR control and setting. as I said before, my model has no control over your color settings, and shouldn't be penalized for it. It's as if you were complaining to a takeout restaurant that the UBER deliver driver was slow-- the food is the same, it's the delivery that's the problem.
(Edited)