In Part 17 of my Unreal Engine 5.1 Endless Runner series, I focus on fixing a few common issues that many of you ran into while following along. I start by demonstrating the two gameplay-breaking problems (I temporarily disable obstacle/coin spawning and crank the character speed to 1000 just to make the bugs super obvious—but you don’t have to do that). The first big issue is the character jumping into the wrong lane when you spam lane switches quickly. The root cause is simple: the current lane index isn’t updated yet, so the next input can push you to the wrong side. To fix it, I add a boolean called “Is Switching Lanes” in BP_RunnerCharacter, set it true while the lane-change timeline is running, and only allow lane input when that flag is false. After that, I fix the slide slowdown by moving away from playing a montage and instead using a Slide state with a 1D Blend Space driven by Ground Speed, so the slide animation matches your actual run speed. I also cover two quick editor/gameplay annoyances: Escape closing the game in editor (rebinding Stop to Shift+Escape), and camera glitching into obstacles during slides (disable Do Collision Test on the Spring Arm).