Do you use the same condition as description like broker, currency pair, timeframe, leverage, etc?
Because another brokers have another properties.
If problem only occurs on a particular EA, you can contact EA's developer by pm.
You have to take into consideration that any EA released in the public domain may not be as lucrative as first though, any EA that was of any value (profit making) would be sold as opposed to free, you only have to think,what would you do with such a system that made you a small fortune, give it away?
You could try subscribing to a contest account to get the signals produced, all of these are currently free at this link https://www.mql5.com/en/signals/mt5/contest