Well, I can’t tell you what the problem is with the Bool, but I can tell that what I see in the screenshot is, to put it mildly, not good. In general, using even one Cast node with Event Tick is a bad idea, and you have 5 of them in the last two positions of your sequence, and what you have in the previous ones I’m too scared to imagine.
I’m begging you to try and review your logic before it’s too late and everything in your game is based in it. You can make lots of stuff happen with events. Answering your question below - yes, you can reference a specific component for the On Begin Overlap event, just select it in the list of components and you can add any event you need from the Details list.