This counts as 3 destinations for Round Robin on the Extractor, even though the chest with an Attractor on it isn't a valid destination.

This causes one of the chests to receive 2 inputs for every 1 the other gets.

Expected outcome should be that Round Robin only counts valid destinations when determining where to send items, so each of the two "valid" targets are counted but not the target inventory that has an Extractor/Attractor/unmatching Filter on it.