Try to prevent recursive energy transfer on cables

src/main/kotlin/ru/dbotthepony/mc/otm/block/entity/cable/EnergyCableBlockEntity.kt

@@ -1,5 +1,6 @@
 package ru.dbotthepony.mc.otm.block.entity.cable
 
+import it.unimi.dsi.fastutil.objects.ObjectArraySet
 import net.minecraft.core.BlockPos
 import net.minecraft.core.Direction
 import net.minecraft.world.level.Level
@@ -114,6 +115,8 @@ abstract class EnergyCableBlockEntity(type: BlockEntityType<*>, blockPos: BlockP
 
 		val sides get() = energySides
 
+		val currentlyTransferringTo = ObjectArraySet<Pair<Node, RelativeSide>>()
+
 		override fun onNeighbour(link: Link) {
 			if (link is DirectionLink) {
 				updateBlockState(link.direction, true)

src/main/kotlin/ru/dbotthepony/mc/otm/block/entity/cable/EnergyCableGraph.kt

@@ -19,6 +19,7 @@ import ru.dbotthepony.mc.otm.core.shuffle
 import ru.dbotthepony.mc.otm.graph.GraphNodeList
 import ru.dbotthepony.mc.otm.onceServer
 import java.util.*
+import java.util.concurrent.atomic.AtomicLong
 import kotlin.collections.ArrayList
 import kotlin.collections.HashSet
 import kotlin.collections.LinkedHashSet
@@ -635,6 +636,11 @@ class EnergyCableGraph : GraphNodeList<EnergyCableBlockEntity.Node, EnergyCableG
 		val snapshot = Reference2ObjectOpenHashMap<Segment, Decimal>()
 
 		for (pair in itr) {
+			// recursion prevention
+			if (!fromNode.currentlyTransferringTo.add(pair))
+				continue
+
+			try {
 				val (node, relSide) = pair
 				val side = node.sides[relSide]!!
 
@@ -726,6 +732,9 @@ class EnergyCableGraph : GraphNodeList<EnergyCableBlockEntity.Node, EnergyCableG
 						paths.forEach { it.shortCircuit = true }
 					}
 				}
+			} finally {
+				fromNode.currentlyTransferringTo.remove(pair)
+			}
 		}
 
 		return received