Yes, I was working off an older project which used 4.15. Like you said, the newer 4.16+ projects did have replication, but I hadn’t used them in a while and had forgotten.
It turns out 4.15 already has the teleportation controllers replicated, but not the activate teleport notifications. I translated your replication code from 4.16 into the 4.15 pawn, removed an ‘IsLocal’ branch and it now works perfectly.
Thank you for the help 