Index: binaries/data/mods/public/simulation/components/UnitAI.js
===================================================================
--- binaries/data/mods/public/simulation/components/UnitAI.js
+++ binaries/data/mods/public/simulation/components/UnitAI.js
@@ -3302,6 +3302,8 @@
 	this.lastAttacked = undefined;
 	this.lastHealed = undefined;
 
+	this.isHealer = undefined;
+
 	this.SetStance(this.template.DefaultStance);
 };
 
@@ -3352,7 +3354,9 @@
 
 UnitAI.prototype.IsHealer = function()
 {
-	return Engine.QueryInterface(this.entity, IID_Heal);
+	if (this.isHealer === undefined)
+		this.isHealer = Engine.QueryInterface(this.entity, IID_Heal) ? true : false;
+	return this.isHealer;
 };
 
 UnitAI.prototype.IsIdle = function()