I have never had an issue and used offshore brokers for 3 years.
What broker do you work with?
To be honest, there’s always going to be some difference between a demo account and a real trading account because of a number of inevitable reasons. That’s why even after using a demo account I traded on a micro account with turnkeyforex to see if they are similar before putting in a bigger amount. Better go with this formula, before going all in.