It does seem to happen at every pivotal moment of volatility and price rises. It's very frustrating and could very likely be an intentional ploy by exchanges to prevent having to pay out such large amounts to customers, because it could wipe out significant amounts of their reserves. That's the conspiracy part of my mind talking, because it would make sense, but I have to hope that isn't the case. Either way it's incredibly disappointing, and it really shouldn't be happening when it comes to financial things.