Well it could be bug but maybe there’s workaround.
Create a new bool variable in your AnimBP and call it for example “IsFootStepPlaying”.
On your notify event connect “IsFootStepPlaying” to false with Playsound function and set bool to true. Use delay or timer, for example, 0.2 sec or so and set bool to **false **again, so it will play only one sound every 0.x seconds.