That sort of trading is seriously high risk on any trading platform. i have even used ones that tell you so in the small print, if you were to get cleaned out there is absolutely no come back on it either. trade with caution.
Margin trading comes with the risk of being wrong about the trade. That isn't what I'm talking about.
This is a problem with their servers not being able to handle the client load and causing massive monetary losses for traders trying to close their margin positions.
i.e. broken trading platform = "accidental" loss of funds
My question is: who is at fault? From my standpoint, if the trader is paying fees to use the servers to handle large sums of money, then it's not weird to expect those servers to function properly.