diff --git a/src/main/kotlin/ru/dbotthepony/mc/otm/block/entity/matter/MatterReconstructorBlockEntity.kt b/src/main/kotlin/ru/dbotthepony/mc/otm/block/entity/matter/MatterReconstructorBlockEntity.kt
index 9f2ff0552..7fcf7bcf5 100644
--- a/src/main/kotlin/ru/dbotthepony/mc/otm/block/entity/matter/MatterReconstructorBlockEntity.kt
+++ b/src/main/kotlin/ru/dbotthepony/mc/otm/block/entity/matter/MatterReconstructorBlockEntity.kt
@@ -137,13 +137,18 @@ class MatterReconstructorBlockEntity(blockPos: BlockPos, blockState: BlockState)
 		matterNode.discover(this)
 	}
 
+	private var changeset = 0
+
 	private fun containerChanged() {
 		matterPerTick = Decimal.ZERO
 		progressPerTick = 0.0
 
 		val item = repairContainer[0]
+		val thisChangeset = ++changeset
 
 		tickList.once {
+			if (thisChangeset != changeset) return@once
+
 			if (lastItem != item.item) {
 				lastItem = item.item
 				repairProgress = 0.0