Issue with wiggle position effect

I am working on a project where an image has to wiggle, starting off slow and eventually ramping up to be faster. However, instead of gradually increasing in speed, the wiggle becomes very fast right after the first keyframe and only returns to the required speed after the second. Between these 2 keyframes, the speed is higher than it should be for either. There is no issue in the graph editor, no issue with the framerate or composition settings, and no other effects present that might conflict with it. I've created a new project and tried replicating the effect on a shape, and got the same result.

After Effects version: 24.4.1
OS: Windows 11