Problem with layers in Bambu Studio

Good afternoon, I’ve run into the following problem: there are different speeds on the layers of my model. The issue is that at the joints of the part the speed increases (the green stripes), and on the finished print, bumps appear on the smooth outer surface, which ruin the whole appearance.

I’ve tried a lot of settings — smoothing, print profiles, speeds — but I still can’t fix this problem. Or maybe the problem isn’t this at all :confused:
Please help.