How do I move my hanging character under a moving platform

I’m able to use a line trace and attach to the bottom of the platform, which works well on static objects. But if the platform is moving, how do I update the player movement to follow along with the platform?

Attach to actor doesn’t seem to work, I want to be able to grab onto a moving platform, latch on, and then jump off at a different point. So far my player just latches on where it detects the hit from the line trace, and then the platform moves on without it.