The unexpected liquidation of your position may be a result of using your Futures Bonus balance as margin for that particular position. However, your Futures Bonus balance has expired and was automatically retrieved by the system. As a result, your position no longer possesses the necessary margin to be maintained, ultimately resulting in its liquidation. Kindly review your margin sources accordingly.
If you have further inquiries, please don't hesitate to contact our Support Team via "Contact Us" function.