Bezier keyframe creating unnecessary movement

So this is a problem that I've recently stumbled across while using Premiere Pro. I'm using bezier curves to keyframe position on a clip, because I want a nice curve of motion. However, I've found that with bezier keyframes, position between two identical keyframes still moves unnecessarily. I believe this is called the Boomerang Effect.

I've looked for a solution to the problem before, and I actually found one. It was using this old video for After Effects, but it still applied and worked in my situation. Here's the link: https://www.youtube.com/watch?v=rLdBTzkMa7k

In short, the proposed solution is to make the first keyframe between two identical keyframes a hold keyframe, so that there cannot be any movement. And this fixed my first problem.

However, the problem I have is when there is movement between keyframes, but only on the X-axis. I've linked two images below.

Between these two frames, the Y-value for position changes unnecessarily, and I can't just hold the keyframe because there's still movement going on, and I don't want to ruin the bezier curve.

This might have been a long-winded explanation for a simple problem, but any help would be greatly appreciated.