I am having a near identical issue with a game I am building. After looking at the screenshots of your blueprints, which are very similar to mine, I am wondering if there is something missing. One person suggested using “Clear Timer by Function Name”; however, this requires the “timer process” to have a function name or event name to which I am bereft in my understanding of how to apply. I am eager to hear of any solutions you find to our common problem. 