Hi Vanessa,

Thanks for getting back to us.  I appreciate you for sharing the detailed information of your concern. 

The changes in the bank's IP address has been raised to our bank engineers and working for a fix. 

While we’re waiting for a permanent fix, please give our Customer Care Team a call/chat to get updates. This way, we’ll be able to send you updates about this issue through email. You can find their most updated phone number in this article: QuickBooks Online Support.

Rest assured, we’ll keep you posted once an update is received. Thank you for your patience and understanding.

Please let me know if you need anything else. I’m always here to help. Have a good one!