I use the following code to check the account balance:

this.console.getOut().println("History Equity= " + this.history.getEquity());
this.console.getOut().println("Account Equity= " + this.account.getEquity());

The result is different. I understand the "account.getEquity()" update every 5 sec. But shouldn't be different so much, right? Is it an another bug?

Screenshot attached.

Please provide us with a more information about your environment. Does it happen (such huge difference) within long period?

In fact, a history equity is actual for the last tick and can differ from the account.equity due to the difference between actual/last tick price and price on the moment of calculation of the account equity (the Profit & Losses for all open orders).
In addition, the history equity takes also into account so-called "close correction" - the Profit&Loss for the just closed orders - the orders, which had been closed between account equity updates.

In general, this situation is exceptional : the instrument price had been change quite significantly and some orders have been closed between account.equity and history.equity calculations.