I’m having trouble with the same thing - I know that the key is to branch on your sprinting boolean during InputAxis MoveRight. If sprinting is false, add movement input and controller yaw input like normal. If true, replace the side-to-side movement input with restricted camera yaw input. The only way I could figure out how to do this is by adding controller yaw input that’s 1/3 as sensitive as the camera’s and simply setting forward movement to 1 when the character is moving in any direction while the sprint button is held.
You’ll notice (if you can find your way through the tangle) that I also added the “1/3 controller yaw input” described above to the regular non-sprinting controls. I did that just because. It looks more like a normal third-person game that way, I think (character orbits camera when moving right or left). But adding controller yaw input and setting the forward vector’s movement input to either 1 or 0 worked for me, in conjunction with my other (unshown) blueprint for setting the character’s max walk speed when the sprint button is held.
While this works, it does not look like clean logic to me. Does anyone know a better way to do this?