diff --git a/gama.core/src/gama/core/kernel/experiment/ExperimentAgent.java b/gama.core/src/gama/core/kernel/experiment/ExperimentAgent.java
index 3f3821e793..8218fe1ce3 100644
--- a/gama.core/src/gama/core/kernel/experiment/ExperimentAgent.java
+++ b/gama.core/src/gama/core/kernel/experiment/ExperimentAgent.java
@@ -358,7 +358,7 @@ public void dispose() {
 		if (dying || dead) return;
 		dying = true;
 		getSpecies().getArchitecture().abort(ownScope);
-		closeSimulations(true);
+		closeSimulations(!getSpecies().isReloading());
 		GAMA.releaseScope(ownScope);
 		super.dispose();
 	}
diff --git a/gama.core/src/gama/core/kernel/experiment/ExperimentPlan.java b/gama.core/src/gama/core/kernel/experiment/ExperimentPlan.java
index f04e541809..771ccd155b 100644
--- a/gama.core/src/gama/core/kernel/experiment/ExperimentPlan.java
+++ b/gama.core/src/gama/core/kernel/experiment/ExperimentPlan.java
@@ -771,12 +771,26 @@ public synchronized void open() {
 		open(seed);
 	}
 
+	// Horrible workaround for #334
+	// ----------------------------------------------------------------------------------
+	private volatile boolean reloading;
+
 	@Override
 	public void reload() {
-		agent.dispose();
+		try {
+
+			reloading = true;
+			agent.dispose();
+		} finally {
+			reloading = false;
+		}
 		open();
 	}
 
+	@Override
+	public boolean isReloading() { return reloading; }
+	// ----------------------------------------------------------------------------------
+
 	@Override
 	public boolean hasParametersOrUserCommands() {
 		return !displayables.isEmpty() || GamaPreferences.Runtime.CORE_MONITOR_PARAMETERS.getValue()
diff --git a/gama.core/src/gama/core/kernel/experiment/IExperimentPlan.java b/gama.core/src/gama/core/kernel/experiment/IExperimentPlan.java
index 4bc013feff..70b3321462 100644
--- a/gama.core/src/gama/core/kernel/experiment/IExperimentPlan.java
+++ b/gama.core/src/gama/core/kernel/experiment/IExperimentPlan.java
@@ -342,4 +342,11 @@ default void setStopCondition(final String cond) {
 	 * @date 15 oct. 2023
 	 */
 	void setParameterValues(IList params);
+
+	/**
+	 * Whether the current experiment is reloading or not (see #344)
+	 *
+	 * @return
+	 */
+	boolean isReloading();
 }
\ No newline at end of file
diff --git a/gama.core/src/gama/core/outputs/AbstractOutputManager.java b/gama.core/src/gama/core/outputs/AbstractOutputManager.java
index f050d6ce5d..4e9cda5bb1 100644
--- a/gama.core/src/gama/core/outputs/AbstractOutputManager.java
+++ b/gama.core/src/gama/core/outputs/AbstractOutputManager.java
@@ -62,8 +62,8 @@ public abstract class AbstractOutputManager extends Symbol implements IOutputMan
 	LayoutStatement layout;
 
 	/** The outputs. */
-	protected final Map<String, IOutput> outputs = GamaMapFactory.create();
-	// GamaMapFactory.synchronizedOrderedMap();
+	protected final Map<String, IOutput> outputs = // GamaMapFactory.create();
+			GamaMapFactory.synchronizedOrderedMap();
 
 	// protected final IList<MonitorOutput> monitors = GamaListFactory.create();