This is an old behavior/bug in MQL5 that I would love to have fixed. I will sometimes click the buy/sell One Click Trade button too rapidly and a double-click event is generated instead of multiple quick single-click events. Summary
I am running MT5 build 2617 17 Sep 2020 and another person on another computer is running MT5 build 2515 17 Sep 2020 both on live accounts and they are periodically freezing up (window title bar shows "Not Responding") with the only workaround being