fix

ygopro-server.coffee

@@ -367,6 +367,7 @@ class ResolveData
   resolve: (err, data) ->
     if @resolved
       return false
+    @resolved = true
     @func(err, data)
     return true
 

ygopro-server.js

@@ -472,6 +472,7 @@
         if (this.resolved) {
           return false;
         }
+        this.resolved = true;
         this.func(err, data);
         return true;
       }