Have no idea what is template component ;d Perhaps i could say smth if you show how you initialize RootComponent and create Capsule Component.
UPD: wait, i found APlayerStart in ue4.
UPD2: well, i see nothing strange in RootComponent. May be you should try to remove VisibleDefaultsOnly specifier for your component?
PS: i am learning Components right now, thats why i am interested in your question too.