Colliding with multiple colliders of same class, one overlap event needed

Hi, I’m creating an physics rolling ball endless runner in 2D. I have create landblocks which get spawned and destroyed to simulate an endless landscape however, I had a problem with the ball skipping on the edges of the box colliders within the landblock actors so, I expanded them to 3 times their length to overlap each other and it seems to work, no skipping. However, I now have a problem with events on overlapping these colliders, I would like to spawn debris when the ball collides with them but, I’m getting 4 overlapping events instead of 1 and I can’t figure out how to limit it. Any advice would be much appreciated.