It might not be causing the issue you're having, but I don't think you really need that first "if". The event itself is already detecting collisions with the player and having the condition detect for just any actor could definitely raise problems for you in the long run.
Try making a break as therealistone suggested, or possibly a knock-back effect. If you have a health system working with it then you won't just have freezing to worry about, it would also mean instant death.