I think you went with a great idea in wrong way 
from experience when making anything endless it’s better to make it appear like pawn is moving (But, standing still) while spawning things infront of player and moving it towards player while deleting everything that is behind player… pretty much what we did on drone trouble:
What we could have done to make it an endless runner is rather spawn (whatever player is running on) and traps(or whatever you call it and make it move towards player and give effect that player is moving and world is endless). But, in reality player is just standing still (or atleast moving in a small local space) and everything is moving towards player.
We took this option because we want games we are making to seem endless and at same time be as light as possible for mobiles.