Question for MetaQuotes: Can MT4 handle negative spread with ECN/STP brokers?

 

I have discovered that MT4 offered by my ECN/STP broker will be freeze when the spread is negative. I have reported this issue to my broker and i was told that it is the limitation of MT4 since it is designed for MM but not for ECN/STP, therefore it cant handle negative spread and nothing can be done by my broker. Is this true?

 
so i have heard