This doesn’t sound like a bug. Event activation is not “Exact Tag” matching, and that makes sense, cause i may want to send GameplayEvent.Projectile and not care if GameplayEvent.Projectile.Rocket is the one to respond. I may want multiple GA’s to actually activate. You can disable them from triggering if they are already active in ShouldAbilityRespondToEvent or using blocking tags to block the activation (or instanced per actor with retrigger unticked).