Get Overlapping Actors not working?

I have an actor class for my game’s characters, and attached to them are child actors for their hitboxes. The hitbox blueprints have a Get Overlapping Actors node in their Tick event. Their mesh has Get Overlap Events selected and Overlap All selected for Collision Presets. The Get Overlapping Actors node is set to detect overlaps with the characters’ actor class. Yet when I overlap one character’s hitboxes with another character, Get Overlapping Actors returns nothing.