diff --git a/Mage.Sets/src/mage/cards/f/FractalHarness.java b/Mage.Sets/src/mage/cards/f/FractalHarness.java
index 8978cdfdce8..94186a3ee6a 100644
--- a/Mage.Sets/src/mage/cards/f/FractalHarness.java
+++ b/Mage.Sets/src/mage/cards/f/FractalHarness.java
@@ -108,14 +108,11 @@ class FractalHarnessDoubleEffect extends OneShotEffect {
 
     @Override
     public boolean apply(Game game, Ability source) {
-        Permanent permanent = (Permanent) getValue("attachedPermanent");
+        Permanent permanent = game.getPermanent((UUID) getValue("sourceId"));
         if (permanent == null) {
             return false;
         }
-        // BUG : changed this to a integer due to the trigger firing twice
-        final int addedCounters = permanent.getCounters(game).getCount(CounterType.P1P1);
-        // BUG : this oneShotEffect is being run twice for some reason, so the number of counters is four times as many
-        return permanent.addCounters(CounterType.P1P1.createInstance(addedCounters),
+        return permanent.addCounters(CounterType.P1P1.createInstance(permanent.getCounters(game).getCount(CounterType.P1P1)),
                  source.getControllerId(), source, game);
     }
 }
diff --git a/Mage/src/main/java/mage/abilities/common/AttacksAttachedTriggeredAbility.java b/Mage/src/main/java/mage/abilities/common/AttacksAttachedTriggeredAbility.java
index bdf2123bcae..089bec735da 100644
--- a/Mage/src/main/java/mage/abilities/common/AttacksAttachedTriggeredAbility.java
+++ b/Mage/src/main/java/mage/abilities/common/AttacksAttachedTriggeredAbility.java
@@ -54,6 +54,8 @@ public class AttacksAttachedTriggeredAbility extends TriggeredAbilityImpl {
         if (equipment != null && equipment.getAttachedTo() != null
                 && event.getSourceId().equals(equipment.getAttachedTo())) {
             getEffects().setValue("sourceId", event.getSourceId());
+            // TODO: Passing a permanent object like this can cause bugs. May need refactoring to use UUID instead.
+            // See https://github.com/magefree/mage/issues/8377
             getEffects().setValue("attachedPermanent", game.getPermanent(event.getSourceId()));
             return true;
         }