Actors carried across seamless travel have construction script rerun

Per https://udn.unrealengine.com/questions/326046/blueprint-properties-reset-across-seamless-travel.html#answer-326562

Create a player controller blueprint
Put a print string in to the construction script
Create a game mode blueprint
Set the game mode's player controller to the one you created
Set the game mode to use seamless travel
Save the map
Launch standalone
"servertravel <mapname>"

Notice that the PrintString occurs multiple times while travelling
Expected: It only prints once