This is happening to me too! I have been waiting over 24 hours, still showing my withdrawal as pending.

This is the response from support:

"Thank you for contacting us about this issue.
I apologize for the inconvenience this may have caused you. We are experiencing a delay when it comes to processing BTC withdrawal transactions. Our technical team is working hard to get the withdrawals moving as fast as they can. Thank you for your patience as we work to resolve this matter."