Hello ,
I’m experiencing the same problem: the children vehicles don’t inherit the anim instance of the parent. In the text box and drop down menu you can see the blueprint but in game the vehicle’s wheels don’t turn. This happens in 4.14.3 and 4.15.1, only tried these.
I have the project, which is the multiplayer tutorial that I was modifing to suit my needs, I can send you a download link.
Thanks.