In my IB SIMULATED account I have been trading a strategy using gold futures.At the start of the year I started with $100k and had the account up to $300k which I thought was pretty good for three months trading.However I was not paying attention when the current gold swoon began and my gains were wiped out before I began to consider closing my positions.I decided to do nothing so as to observe how the IB computers delt with such a situation.As gold continued down the IB computers did close my positions but I was surprised to see,at the end,that the account ended up owing IB $27k.My thinking is that this is not good and I have to hope that this would not happen with a real account.Do IB need to do some more work on the simulated account to make it realistic?Or is there a real problem.
IB sim is a duplicate of your real thing.
You did not give detail of your "event", so it is not fair to speculate a problem.
Any comments to your "question" is pure conjecture.
The basic rule of thumb is, if you hold a position over night, and the contract/stock gap opens, you can get into a deficit situation. And it has nothing to do with IB's computer or compliance.
Ultimately you are responsible to manage your position.