diff --git a/src/main/kotlin/ru/dbotthepony/mc/otm/block/entity/cable/EnergyCableGraph.kt b/src/main/kotlin/ru/dbotthepony/mc/otm/block/entity/cable/EnergyCableGraph.kt
index 867599c3b..6ab9b9646 100644
--- a/src/main/kotlin/ru/dbotthepony/mc/otm/block/entity/cable/EnergyCableGraph.kt
+++ b/src/main/kotlin/ru/dbotthepony/mc/otm/block/entity/cable/EnergyCableGraph.kt
@@ -426,6 +426,9 @@ class EnergyCableGraph : GraphNodeList<EnergyCableBlockEntity.Node, EnergyCableG
 
 		openNodes.add(SearchNode(a, b, null, seenTop))
 
+		val existingNodes = HashSet<EnergyCableBlockEntity.Node>()
+		existing.forEach { existingNodes.addAll(it.nodes) }
+
 		while (openNodes.isNotEmpty()) {
 			val first = openNodes.remove()
 			openNodes.remove(first)
@@ -466,7 +469,7 @@ class EnergyCableGraph : GraphNodeList<EnergyCableBlockEntity.Node, EnergyCableG
 			} else {
 				for (neighbour in first.node.neighboursView.values) {
 					if (!seenNodes.add(neighbour) || !neighbour.canTraverse) continue
-					val seen = existing.any { neighbour in it }
+					val seen = neighbour in existingNodes
 					if (seen && neighbour.energyThroughput <= threshold) continue
 					openNodes.add(SearchNode(neighbour, b, first, seen))
 				}