How to make all the actors in the explosion area apply damage?

I want to deal damage to all the actors in the damage area
But when I used apply radial damage function
It only can do damage to some actors
like there are two actors in the line
It only deals damage to the front actors but not the behind actor
My English is not good, I hope your guys understand what I trying to tell you

When explosion event shots, you should cast damage to actor class. It will influence all classes below (for example skeletal meshes)

You tag as c++, So my experience is only in blueprints, but hope you can do that you want, using my answer