Can't parent child actor components

I’ve got a basic actor blueprint set up, which uses several other actors to make one complete one. However, it seems that the child actor component class doesn’t like to be parented to other child actor classes. They move as a group when I move them around in the viewport, but once I go into runtime, the BP_Body section works with physics as intended, but all the child actors that are attached don’t follow. I have confirmed that they are set up the same way and set to movable, so I’m thinking it must be a parenting thing I have missed. Any ideas?

98990-untitled-1.png