Hi!
I’m having this exact same problem with some moving platforms I’ve created. I have a floor blueprint that randomly spawns with a bridge that moves along the Y-axis. These platforms can spawn at 0, 45, 90, 180 degree orientations but obviously only move correctly when they spawn at 0 degrees. I realised this was because the timeline was relative to the world axis, but I can’t find away to change this without creating a different timeline for each orientation and calling in the correct timeline based on the objects orientation on spawn. Is this the only way?
Did you manage to find an answer? If so, could you pass it on please? I’d be super grateful 
Cheers
Pete